Cosmetic composition capable of instantly brightening skin color and application thereof

Abstract

The embodiment of the invention provides a cosmetic composition capable of instantly brightening skin color and application of the cosmetic composition. The cosmetic composition comprises the following components in percentage by weight: 10-25% of glycerol; 1-5% of fructose; 0.1 to 1% of maltose; 0.1 to 1% of trehalose; 0.1 to 1% of allantoin; 0.01 to 0.1 percent of glucose; 0.1 to 1 percent of p-hydroxyacetophenone; based on the total weight of the cosmetic composition. The cosmetic composition provided by the embodiment of the invention not only can provide anti-oxidation and cell protection effects and reduce oxidative stress induced pigmentation, but also can regulate interaction between light and skin and reduce light scattering on the surface of the skin, so that the cosmetic composition has the effects of instantly brightening the skin and improving the glossiness and whiteness of the skin.

Description

TECHNICAL FIELD

[0001] The embodiments of the present disclosure relate to the technical field of cosmetics, in particular to a cosmetic composition for instant skin lightening and use thereof. BACKGROUND

[0002] Skin dullness and insufficient lightening are common problems in skin care, especially in Asian countries or regions. In the prior art, some products can improve skin condition, but the lightening effect is still not significant. For example, most products focus on inhibiting melanin production or transport (such as using niacinamide, arbutin, VC derivatives, etc.), but this is a slow process, usually taking several weeks to take effect, which cannot meet the instant demand.

[0003] At present, consumers hope to achieve instant lightening effect when using facial masks or water-based products, but some products lack instant lightening effect and cannot quickly improve skin luster and brightness.

[0004] Therefore, it is a technical problem to be solved in the field to develop a product with instant skin lightening effect. SUMMARY

[0005] The purpose of the embodiments of the present disclosure is to provide a cosmetic composition for instant skin lightening and use thereof.

[0006] To achieve the above-mentioned purpose, the embodiments of the present disclosure propose the following technical solutions: In a first aspect, the embodiments of the present disclosure provide a cosmetic composition for instant skin lightening, which comprises, by weight percentage: glycerin: 10-25%; fructose: 1-5%; maltose: 0.1-1%; trehalose: 0.1-1%; allantoin: 0.1-1%; glucose: 0.01-0.1%; p-hydroxyacetophenone: 0.1-1%; based on the total weight of the cosmetic composition.

[0007] As an embodiment of the present disclosure, the cosmetic composition further comprises: 1,2-hexanediol: 1-5%, based on the total weight of the cosmetic composition.

[0008] As an embodiment of the present disclosure, the cosmetic composition further comprises at least one cosmetic additive.

[0009] As an implementation form of the present disclosure, the cosmetic additive is at least one of water, sodium chloride, citric acid, and sodium hydroxide.

[0010] In a second aspect, the present disclosure provides a use of the cosmetic composition of the first aspect in the preparation of a skin care product.

[0011] As an implementation form of the present disclosure, the content of the cosmetic composition is 0.5-10% based on the total weight of the skin care product.

[0012] In a third aspect, the present disclosure provides a use of a combination of glycerol, fructose, maltose, trehalose, allantoin, glucose, and p-hydroxyacetophenone in the preparation of a cosmetic composition having the effect of instantly brightening skin color.

[0013] As an implementation form of the present disclosure, in the cosmetic composition, the content of the glycerol is 10-25%, the content of the fructose is 1-5%, the content of the maltose is 0.1-1%, the content of the trehalose is 0.1-1%, the content of the allantoin is 0.1-1%, the content of the glucose is 0.01-0.1%, and the content of the p-hydroxyacetophenone is 0.1-1% based on the total weight of the cosmetic composition.

[0014] As an implementation form of the present disclosure, the cosmetic composition further comprises 1,2-hexanediol, and the content of the 1,2-hexanediol is 1-5% based on the total weight of the cosmetic composition.

[0015] As an implementation form of the present disclosure, the cosmetic composition further comprises at least one of water, sodium chloride, citric acid, and sodium hydroxide.

[0016] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has at least the following beneficial effects: The cosmetic composition provided by the embodiments of the present disclosure not only can provide antioxidant and cell protection effects, reduce pigment deposition induced by oxidative stress, but also can regulate the interaction between light and skin, reduce light scattering on the surface of the skin, and thus can improve skin gloss, brightness, and whiteness in a short time after use, and repair the skin barrier.

[0017] Additional aspects and advantages of the present disclosure will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which are included to provide a further understanding of the present disclosure and constitute a part of this disclosure, illustrate embodiments of the present disclosure and do not limit the present disclosure in any way. In the drawings: Figure 1The test results for glossiness in Example 1 are shown; Figure 2 The test results of skin brightness L* value in Example 1 are shown; Figure 3 The test results of the whiteness ITA° value in Example 1 are shown; Figure 4 The test results for transdermal water loss (TEWL) in Example 1 are shown; Figure 5 The test results of skin brightness L* value in Example 2 are shown. Detailed Implementation

[0019] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0020] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0021] It should also be understood that the terminology used in this specification of embodiments is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this disclosure. As used in this specification of embodiments and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0022] The following explanations of some terms and raw materials used in this embodiment will help those skilled in the art to understand them. All percentages in the following raw materials are by weight.

[0023] The technical solution of this embodiment is described in detail below.

[0024] First, the cosmetic composition according to the first aspect of this embodiment will be described.

[0025] Cosmetic composition.

[0026] In the current technology, when consumers use face masks or water-based products, they hope to achieve an instant brightening effect, that is, to improve skin brightness in a short period of time; however, current related products lack an instant brightening effect and cannot quickly improve skin radiance and brightness.

[0027] In view of this, this embodiment proposes a cosmetic composition for instantly brightening skin tone. By weight percentage, the cosmetic composition of this embodiment includes: glycerin: 10-25%, fructose: 1-5%, maltose: 0.1-1%, trehalose: 0.1-1%, allantoin: 0.1-1%, glucose: 0.01-0.1%, and p-hydroxyacetophenone: 0.1-1%, based on the total weight of the cosmetic composition.

[0028] It should be noted that the cosmetic composition of this embodiment is completely different from conventional moisturizing. Those skilled in the art will know that moisturizing primarily acts on the outermost layer of the skin, the stratum corneum, by replenishing and locking in moisture to maintain the normal water content of the stratum corneum and prevent dryness. Typically, moisturizing (hydrating) effects are short-lived and do not change skin tone. However, the cosmetic composition of this embodiment can achieve optical cleansing in a short time after application. Through mechanisms such as refractive index matching and moderate dehydration within the skin tissue, it reduces the degree of light scattering on the skin surface, thereby improving skin radiance, brightness, and whiteness, while also repairing the skin barrier.

[0029] In other words, moisturizing addresses the problem of dry skin. For example, commonly used high-molecular-weight hyaluronic acid, while possessing excellent moisturizing and water-locking properties, cannot achieve optical clearance through effective refractive index matching or dehydration effects. Therefore, it is difficult to reduce light scattering on the skin surface and improve skin radiance. The cosmetic composition of this embodiment, however, can defend against oxidative stress-induced skin pigmentation through its antioxidant effect, and simultaneously achieve optical clearance through refractive index matching and a moderate stratum corneum dehydration effect, reducing light scattering on the skin surface and effectively improving skin radiance, brightness, and whiteness. This embodiment actually addresses the problem of skin that is "dark" or "dull."

[0030] The relevant raw materials in the cosmetic composition of this embodiment will be further described below.

[0031] Those skilled in the art will recognize that the core factors influencing skin brightness and radiance include: melanin deposition, dullness caused by oxidative stress, skin barrier integrity, and the interaction between light and skin.

[0032] The cosmetic composition of this embodiment not only provides antioxidant and cell protection effects, reducing oxidative stress-induced pigmentation, but also achieves optical cleansing through refractive index matching and a moderate stratum corneum dehydration effect, reducing light scattering on the skin surface. Therefore, it can improve skin radiance, brightness and whiteness, and repair the skin barrier in a short time after use.

[0033] First, p-hydroxyacetophenone possesses antioxidant properties, which can defend against skin dullness induced by oxidative stress. Simultaneously, glycerol, glucose, fructose, maltose, and trehalose, through their numerous hydroxyl groups, can increase the average refractive index of skin tissue, achieving refractive index matching and thus playing a role in optical scavenging and reducing light scattering, thereby enhancing the skin's radiance and translucency. Based on this, this embodiment utilizes the antioxidant properties of p-hydroxyacetophenone and the optical scavenging effects of glycerol, glucose, fructose, and trehalose to synergistically improve skin dullness and enhance skin radiance and brightness.

[0034] Secondly, since inflammation induces the generation of ROS, and ROS in turn aggravates inflammation, it ultimately leads to excessive activation of melanocytes and post-inflammatory hyperpigmentation. In this embodiment, p-hydroxyacetophenone, as a phenolic antioxidant, can prevent free radicals from stimulating melanocytes and causing abnormal pigment deposition by scavenging free radicals. Fructose and trehalose, as carbohydrate antioxidants, form a carbohydrate antioxidant network to jointly reduce the stimulation of melanocytes by oxidative stress. Allantoin, as an anti-inflammatory antioxidant, can inhibit the release of inflammatory factors (such as IL-6 and TNF-α) and reduce melanocyte activation caused by inflammatory stimulation. Therefore, this embodiment uses p-hydroxyacetophenone (phenolic antioxidant), fructose / trehalose (carbohydrate antioxidant), and allantoin (anti-inflammatory antioxidant) to synergistically scavenge free radicals and defend against the interference of oxidative stress on pigment metabolism.

[0035] Furthermore, a damaged skin barrier can lead to a vicious cycle of sensitivity, inflammation, and dullness. When the barrier is incomplete, external stimuli (such as ultraviolet rays and pollutants) can easily penetrate the skin, triggering inflammation and subsequently causing post-inflammatory hyperpigmentation. Simultaneously, a decreased ability to retain moisture in the skin barrier can also lead to dryness, roughness, and dullness of the stratum corneum. Among the aforementioned components, trehalose can form a protective film on the surface of keratinocytes, protecting the intercellular lipids from damage by external stimuli and reducing factors that induce barrier damage. Allantoin promotes keratinocyte proliferation and accelerates the repair of damaged areas of the barrier; glycerol assists in the synthesis of lipids in the stratum corneum, making the barrier more complete; while fructose and glucose provide energy for barrier repair cells (such as fibroblasts and keratinocytes), and maltose provides continuous energy after decomposition, ensuring efficient repair and enabling rapid repair of the skin barrier. Therefore, this embodiment reduces barrier damage through the protective effect of trehalose, supplements the barrier structure through the repairing effects of allantoin and glycerol, and further accelerates repair efficiency through the energy supply of sugars, thereby achieving skin barrier repair in a shorter time, avoiding repeated dullness caused by barrier problems, and maintaining a brightening effect.

[0036] In summary, the cosmetic composition of this embodiment can work together from multiple dimensions to defend against pigmentation, improve skin radiance and brightness in a short period of time, thereby improving the appearance of the skin.

[0037] In this embodiment, the cosmetic composition of this embodiment includes: The glycerol content includes, but is not limited to: 10%, 11%, 12%, 13%, 13.5%, 14%, 14.5%, 15%, 15.5%, 16%, 16.5%, 17%, 17.2%, 17.6%, 18%, 18.6%, 18.8%, 19%, 19.2%, 19.5%, 19.8%, 20%, 21%, 22%, 23%, 24%, and 25%.

[0038] The fructose content includes, but is not limited to: 1.0%, 1.3%, 1.6%, 1.7%, 1.8%, 1.88%, 1.9%, 1.97%, 2.0%, 2.3%, 2.5%, 2.7%, 2.8%, 2.9%, 3.0%, 4.0%, 4.1%, 4.15%, 4.2%, 4.28%, 4.3%, 4.4%, 4.5%, 4.6%, 4.7%, 4.8%, 4.9%, and 5%.

[0039] The maltose content includes, but is not limited to: 0.1%, 0.12%, 0.15%, 0.19%, 0.2%, 0.22%, 0.24%, 0.3%, 0.37%, 0.39%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, and 1.0%.

[0040] The trehalose content includes, but is not limited to: 0.1%, 0.12%, 0.15%, 0.19%, 0.2%, 0.22%, 0.24%, 0.3%, 0.37%, 0.39%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, and 1.0%.

[0041] The allantoin content includes, but is not limited to: 0.1%, 0.12%, 0.15%, 0.19%, 0.2%, 0.22%, 0.24%, 0.3%, 0.37%, 0.39%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, and 1.0%.

[0042] The glucose content includes, but is not limited to: 0.01%, 0.012%, 0.015%, 0.019%, 0.02%, 0.022%, 0.024%, 0.03%, 0.037%, 0.039%, 0.04%, 0.042%, 0.044%, 0.046%, 0.048%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, and 0.1%.

[0043] The content of p-hydroxyacetophenone includes, but is not limited to: 0.1%, 0.12%, 0.15%, 0.19%, 0.2%, 0.22%, 0.24%, 0.3%, 0.37%, 0.39%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, and 1.0%.

[0044] 1,2-Hexanediol.

[0045] In addition to the components mentioned above, the cosmetic composition of this embodiment also includes 1,2-hexanediol: 1-5%, based on the total weight of the cosmetic composition.

[0046] Firstly, in this embodiment, 1,2-hexanediol ensures uniform dispersion of the active ingredients, preventing localized efficacy failure. Specifically, the two hydroxyl groups (-OH) in the 1,2-hexanediol molecule can form hydrogen bonds with the polar groups (such as the amide group of allantoin and the phenolic hydroxyl group of p-hydroxyacetophenone) of ingredients like allantoin and p-hydroxyacetophenone, breaking the intermolecular forces of these ingredients and significantly improving their solubility in the aqueous or oil phase. This ensures that the core brightening ingredients, such as allantoin, p-hydroxyacetophenone, and trehalose, are uniformly dispersed in the cosmetic system, avoiding unresolved localized dullness and guaranteeing the stable performance of anti-inflammatory, antioxidant, and optically clearing effects.

[0047] Meanwhile, 1,2-hexanediol can work with allantoin, glycerin, trehalose, and other ingredients to repair the skin barrier. 1,2-hexanediol can maintain the hydration of the stratum corneum. Dryness leads to disordered keratinocyte arrangement and decreased barrier repair efficiency. Sufficient moisture provides a repair carrier for allantoin, glycerin, and other ingredients, accelerating lipid synthesis in the stratum corneum and allowing the barrier to recover its integrity more quickly.

[0048] Furthermore, 1,2-hexanediol also possesses a certain penetration-enhancing ability. As a small-molecule alcohol, 1,2-hexanediol can slightly and reversibly interfere with the arrangement of the lipid bilayer in the stratum corneum of the skin, temporarily increasing the fluidity of intercellular lipids, thereby opening penetration channels for other active ingredients. This effect can indirectly enhance the efficacy of other brightening ingredients. For example, it can help p-hydroxyacetophenone penetrate more effectively into the deep epidermis to exert its antioxidant effect; it can also help ingredients such as trehalose to be better absorbed, exerting their optical cleansing and cell-protecting effects. This makes the entire brightening system's effect not only limited to the skin surface, but also has a deeper and faster-acting effect.

[0049] In this embodiment, the content of 1,2-hexanediol includes, but is not limited to: 1.0%, 1.3%, 1.6%, 1.7%, 1.8%, 1.88%, 1.9%, 1.97%, 2.0%, 2.3%, 2.5%, 2.7%, 2.8%, 2.9%, 3.0%, 4.0%, 4.1%, 4.15%, 4.2%, 4.28%, 4.3%, 4.4%, 4.5%, 4.6%, 4.7%, 4.8%, 4.9%, and 5%.

[0050] Other components.

[0051] It should be understood that the cosmetic composition of this embodiment can be formulated with other components (i.e., cosmetic additives) commonly used in the art, added reasonably to the above-described components to create a cosmetic composition of the corresponding dosage form. For example, other components commonly used in the art can be reasonably used without significantly impairing the effect of this embodiment.

[0052] The types and contents of other components can be adjusted according to the type of product being made.

[0053] For example, the aforementioned cosmetic additives can be any ingredients known in the art, such as solvents, pH adjusters, and cosmetic excipients, and their type and dosage can be selected according to specific needs.

[0054] In this embodiment, the solvent is known in the art. For example, conventional solvents such as water and butanediol can be selected.

[0055] For example, in a cosmetic composition, the water content is 50-85% based on the total weight of the cosmetic composition.

[0056] Among them, cosmetic excipients can be selected from conventional excipients such as emulsifiers, pH adjusters, thickeners, preservatives, and fragrances.

[0057] For example, the emulsifiers mentioned above include, but are not limited to, one or more of the following: sorbitan oleate, stearyl alcohol polyether-21, PEG-60 hydrogenated castor oil, glyceryl oleate citrate, PPG-13-decyltetradecyl alcohol polyether-24, cetearyl glucoside, etc.

[0058] The pH adjusters mentioned above include, but are not limited to, one or more of citric acid and sodium hydroxide.

[0059] For example, in a cosmetic composition, the content of citric acid is 0.1-1%, and the content of sodium hydroxide is 0.1-0.5%, based on the total weight of the cosmetic composition.

[0060] The aforementioned thickeners or viscosity modifiers include, but are not limited to, one or more of the following: sodium chloride, ammonium acryloyl dimethyl taurate / stearyl alcohol polyether-8 methacrylate copolymer, hydroxyethyl cellulose, hydroxypropyl cellulose, carbomer, xanthan gum, gum arabic, ammonium acryloyl dimethyl taurate / VP copolymer.

[0061] For example, in a cosmetic composition, the content of sodium chloride is 0.1-1%, based on the total weight of the cosmetic composition.

[0062] The preservatives include, but are not limited to, one or more of methylparaben, phenoxyethanol, benzyl alcohol, phenethyl alcohol, potassium sorbate, sodium benzoate, chlorphenesin, etc., or preservative-preserving components not listed in the preservative list, such as one or more of p-hydroxyacetophenone, glyceryl caprylate, capryloyl hydroxamic acid, pentylene glycol, hexanediol, etc.

[0063] For example, the content of the preservative is 0-2%, preferably 0-0.8%, based on the total weight of the cosmetic composition.

[0064] The cosmetic composition of this embodiment can be formulated into conventional dosage forms such as aqueous solutions, serums, lotions, creams, ointments, and masks.

[0065] It is understood that the cosmetic composition of this embodiment can be prepared by any suitable method known in the art. This embodiment will not elaborate on the preparation method.

[0066] Next, the use of the second aspect in this embodiment will be explained.

[0067] use.

[0068] This embodiment further illustrates the use of the cosmetic composition described in the first aspect in the preparation of skin care products.

[0069] Based on the description in the first aspect, the cosmetic composition of this embodiment can provide antioxidant and cell-protective effects, reduce oxidative stress-induced pigmentation, and regulate the interaction between light and skin, reducing light scattering on the skin surface. Therefore, it can improve skin radiance, brightness, and whiteness, and repair the skin barrier in a short period of time after use. Thus, the skincare product prepared in this embodiment also possesses the corresponding effects.

[0070] In the skin care product, the content of the cosmetic composition is 0.5-10%, preferably 0.5-5%, more preferably 0.5-2%, based on the total weight of the skin care product.

[0071] The products made in this embodiment include, but are not limited to, toners, serums, lotions, creams, sprays or sunscreens, as well as face masks based on water, serums or lotions.

[0072] It is understood that the skincare products made in this embodiment can be used as fast-repairing skincare products, which can quickly improve skin brightness, radiance and whiteness in a short period of time to meet the relevant needs of consumers.

[0073] The use of the combination of glycerol, fructose, maltose, trehalose, allantoin, glucose and p-hydroxyacetophenone in the preparation of a cosmetic composition with an immediate skin brightening effect will be described below.

[0074] use.

[0075] This embodiment also illustrates the use of a combination of glycerin, fructose, maltose, trehalose, allantoin, glucose, and p-hydroxyacetophenone in the preparation of cosmetic compositions with an immediate skin brightening effect.

[0076] Based on the above uses, the cosmetic composition of this embodiment can improve the appearance of the skin in a short time after use, such as preventing pigmentation, improving skin luster and brightness, and repairing the skin barrier.

[0077] It should be noted that the cosmetic composition in this embodiment has a completely different moisturizing effect from conventional substances. Currently, moisturizing primarily works on the outermost layer of the skin, the stratum corneum, by replenishing and locking in moisture to maintain the normal water content of the stratum corneum and prevent dryness. At the same time, the moisturizing (hydrating) effect is short-lived and does not change skin tone. In other words, moisturizing addresses the problem of dry skin. For example, commonly used high-molecular-weight hyaluronic acid, while possessing excellent moisturizing and water-locking properties, cannot achieve optical clearance through effective refractive index matching or dehydration effects, thus making it difficult to reduce light scattering on the skin surface and improve skin radiance.

[0078] This embodiment specifically addresses the issue of skin that is "dark" or "dull". As mentioned earlier, the cosmetic composition of this embodiment not only has antioxidant, anti-inflammatory, and anti-pigmentation properties, but also achieves optical cleansing through refractive index matching and a moderate stratum corneum dehydration effect, reducing light scattering on the skin surface and effectively improving the skin's luster, brightness, and whiteness.

[0079] Those skilled in the art will recognize that key factors influencing skin brightness and whiteness include melanin deposition, dullness caused by oxidative stress, skin barrier integrity, and the interaction between light and skin. The cosmetic composition of this embodiment not only provides antioxidant and cellular protection, reducing oxidative stress-induced pigmentation, but also achieves optical cleansing through refractive index matching and a moderate stratum corneum dehydration effect, reducing light scattering on the skin surface. Therefore, it can improve skin radiance, brightness, and whiteness, as well as repair the skin barrier, within a short period after use.

[0080] First, p-hydroxyacetophenone possesses antioxidant properties, which can defend against skin dullness induced by oxidative stress. Simultaneously, glycerol, glucose, fructose, maltose, and trehalose, through their numerous hydroxyl groups, can increase the average refractive index of skin tissue, achieving refractive index matching and thus playing a role in optical scavenging and reducing light scattering, thereby enhancing the skin's radiance and translucency. Based on this, this embodiment utilizes the antioxidant properties of p-hydroxyacetophenone and the optical scavenging effects of glycerol, glucose, fructose, and trehalose to synergistically improve skin dullness and enhance skin radiance and brightness.

[0081] Secondly, since inflammation induces the generation of ROS, and ROS in turn aggravates inflammation, it ultimately leads to excessive activation of melanocytes and post-inflammatory hyperpigmentation. In this embodiment, p-hydroxyacetophenone, as a phenolic antioxidant, can prevent free radicals from stimulating melanocytes and causing abnormal pigment deposition by scavenging free radicals. Fructose and trehalose, as carbohydrate antioxidants, form a carbohydrate antioxidant network to jointly reduce the stimulation of melanocytes by oxidative stress. Allantoin, as an anti-inflammatory antioxidant, can inhibit the release of inflammatory factors (such as IL-6 and TNF-α) and reduce melanocyte activation caused by inflammatory stimulation. Therefore, this embodiment uses p-hydroxyacetophenone (phenolic antioxidant), fructose / trehalose (carbohydrate antioxidant), and allantoin (anti-inflammatory antioxidant) to synergistically scavenge free radicals and defend against the interference of oxidative stress on pigment metabolism.

[0082] Furthermore, a damaged skin barrier can lead to a vicious cycle of sensitivity, inflammation, and dullness. When the barrier is incomplete, external stimuli (such as ultraviolet rays and pollutants) can easily penetrate the skin, triggering inflammation and subsequently causing post-inflammatory hyperpigmentation. Simultaneously, a decreased ability to retain moisture in the skin barrier can also lead to dryness, roughness, and dullness of the stratum corneum. Among the aforementioned components, trehalose can form a protective film on the surface of keratinocytes, protecting the intercellular lipids from damage by external stimuli and reducing factors that induce barrier damage. Allantoin promotes keratinocyte proliferation and accelerates the repair of damaged areas of the barrier; glycerol assists in the synthesis of lipids in the stratum corneum, making the barrier more complete; while fructose and glucose provide energy for barrier repair cells (such as fibroblasts and keratinocytes), and maltose provides continuous energy after decomposition, ensuring efficient repair and enabling rapid repair of the skin barrier. Therefore, this embodiment reduces barrier damage through the protective effect of trehalose, supplements the barrier structure through the repairing effects of allantoin and glycerol, and further accelerates repair efficiency through the energy supply of sugars, thereby achieving skin barrier repair in a shorter time, avoiding repeated dullness caused by barrier problems, and maintaining a brightening effect.

[0083] In summary, the moisturizing effect of this embodiment is completely different from that of the prior art. This embodiment can work together from multiple dimensions to prevent pigmentation, improve skin radiance and brightness in a short time, and thus improve the appearance of the skin.

[0084] Therefore, this embodiment essentially provides a new use for the combination of glycerin, fructose, maltose, trehalose, allantoin, glucose and p-hydroxyacetophenone in achieving instant skin brightening.

[0085] In one embodiment of this example, the cosmetic composition contains 10-25% glycerin, 1-5% fructose, 0.1-1% maltose, 0.1-1% trehalose, 0.1-1% allantoin, 0.01-0.1% glucose, and 0.1-1% p-hydroxyacetophenone, based on the total weight of the cosmetic composition.

[0086] As one embodiment of this example, the cosmetic composition further includes 1,2-hexanediol, the content of which is 1-5% based on the total weight of the cosmetic composition.

[0087] As can be understood, referring to the description in the first aspect, this embodiment uses 1,2-hexanediol to ensure that the core brightening ingredients, such as allantoin, p-hydroxyacetophenone, and trehalose, are evenly dispersed in the cosmetic system, avoiding the problem of unresolved localized dullness and ensuring the stable performance of anti-inflammatory, antioxidant, and optically clearing effects. Simultaneously, 1,2-hexanediol maintains the hydration environment of the stratum corneum. Dryness leads to disordered keratinocyte arrangement and decreased barrier repair efficiency, while sufficient moisture provides a repair carrier for ingredients such as allantoin and glycerin, accelerating lipid synthesis in the stratum corneum and allowing the barrier to recover its integrity more quickly. Furthermore, 1,2-hexanediol enhances penetration, opening penetration channels for other active ingredients, allowing the entire brightening system to work beyond the skin surface, achieving deeper and faster-acting effects.

[0088] It should be understood that the cosmetic composition of this embodiment can be formulated by reasonably adding other components commonly used in the art, i.e. cosmetic additives, on the basis of the above components, to prepare a cosmetic composition of the corresponding dosage form.

[0089] The specific selection of cosmetic additives can be adapted to the needs of different dosage forms. For the cosmetic additives in this embodiment, please refer to the relevant description of the cosmetic composition in the first aspect.

[0090] The present disclosure is further illustrated below with reference to embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the disclosure.

[0091] Unless otherwise specified, all materials, reagents and instruments used in the following embodiments are commercially available, and all percentages (%) in the following embodiments represent weight percentages.

[0092] Example 1: In this embodiment, facial masks with the following formulations were prepared, and their specific compositions are shown in Table 1. In Table 1, the cosmetic composition consists of: 17.5% glycerin, 3% fructose, 0.5% maltose, 0.5% trehalose, 0.5% allantoin, 0.1% glucose, 0.3% p-hydroxyacetophenone, 3% 1,2-hexanediol, 0.5% sodium chloride, appropriate amounts of citric acid and sodium hydroxide to adjust the pH of the composition to 5.5, and water to make up to 100%.

[0093] Table 1: Composition and content (Wt.%) of Group A and Group B In this embodiment, the active ingredient group (Group B) is the experimental group, and the placebo group (Group A) is the control group.

[0094] The method for preparing the above composition includes: 1. Mix phase A, heat to 50°C, and stir until clear.

[0095] 2. Cool to 25°C, then add phase B to phase A and stir for 2 minutes; 3. Add phase C to A and stir until well mixed; 4. Add phase D to phase A and mix thoroughly; 5. Use phase E to adjust the pH to 5.5.

[0096] The following will test the preparation of the above composition into a face mask, wherein the face mask is made from the above composition at a concentration of 0.1 g / cm³. 2 The amount of product used was soaked in the mask sheet to obtain either Group A or Group B products. Next, the effects on improving skin radiance, skin brightness, whiteness, and transepidermal water loss were evaluated.

[0097] Ten participants were recruited and randomly assigned to use product group A on one half of their face and product group B on the other half. Skin condition was assessed before applying the mask. The mask was applied for 10 minutes and then removed. Skin condition was assessed again at 30 minutes, 2 hours, and 6 hours.

[0098] 1) Skin gloss test.

[0099] Before using the face mask and at 30 minutes, 2 hours, and 6 hours after using the face mask, the luster of the skin on the cheek area was tested using a Glossymeter probe from the German company CK. Figure 1 The test results for glossiness are shown. Figure 1 In the test results, placebo corresponds to the placebo (Group A), and active ingredient group corresponds to the test results of Group B.

[0100] Depend on Figure 1The results of the gloss test showed that after using the Group B mask for 30 minutes, 2 hours, and 6 hours, the skin gloss was significantly improved compared to before use, with improvement rates of 22.29%, 8.36%, and 4.96%, respectively. Meanwhile, the mask containing the cosmetic composition of this invention (Group B, active ingredient group) showed significantly better immediate gloss improvement (30 minutes) and long-lasting effect (6 hours) than the placebo group (Group A). ​​This indicates that the cosmetic composition of this embodiment can provide an immediate improvement in skin gloss.

[0101] 2) Skin brightness and whiteness test.

[0102] Before applying the face mask and at 30 minutes, 2 hours, and 6 hours after application, the brightness (L* value) and whiteness (ITA° value) of the cheek area were measured using a Colorimeter probe from CK (Germany). A higher L* value indicates brighter skin; a higher ITA° value indicates whiter skin.

[0103] Figure 2 The test results for brightness (L* value) are shown. Figure 2 In the test results, placebo corresponds to the placebo (Group A), and active ingredient group corresponds to the test results of Group B. Figure 3 The test results for whiteness (ITA° value) are shown. Figure 3 In the test results, placebo corresponds to the placebo (Group A), and active ingredient group corresponds to the test results of Group B.

[0104] Depend on Figure 2 and Figure 3 The test results show that after using the Group B mask for 30 minutes, 2 hours, and 6 hours, skin brightness (L* value) and whiteness (ITA° value) were significantly improved compared to before use. Furthermore, the mask containing the cosmetic composition of this invention (Group B) showed significantly better immediate brightening effect (30 minutes) and long-lasting effect (6 hours) than the placebo group (Group A). ​​This indicates that the cosmetic composition of this embodiment can provide an immediate skin brightening effect.

[0105] 3) Skin transepidermal water loss test.

[0106] Before applying the face mask and at 30 minutes, 2 hours, and 6 hours after application, the transepidermal water loss (TEWL) of the skin in the cheek area was measured using a Tewameter probe from CK (Germany). The lower the TEWL value, the better the skin barrier function.

[0107] Figure 4 The test results for transdermal water loss (TEWL) are shown. Figure 4In the test results, placebo corresponds to the placebo (Group A), and active ingredient group corresponds to the test results of Group B.

[0108] Depend on Figure 4 The test results showed that after using the Group B mask for 30 minutes, 2 hours, and 6 hours, the transepidermal water loss (TEWL) of the skin was significantly reduced compared to before use, with reduction rates of 23.42%, 19.00%, and 16.38%, respectively. This indicates an improvement in skin barrier function and water retention capacity. Furthermore, the mask containing the cosmetic composition of this embodiment (Group B) showed significantly better immediate (30 minutes) and long-lasting (6 hours) effects than the placebo group (Group A). ​​This demonstrates that the cosmetic composition of this embodiment can provide immediate repair of skin barrier function.

[0109] Therefore, the cosmetic composition of this embodiment not only provides antioxidant and cell protection effects, defends against oxidative stress-induced pigmentation (significantly improving skin whiteness), but also achieves optical cleansing through refractive index matching and a moderate stratum corneum dehydration effect, reducing light scattering on the skin surface (significantly improving skin luster and brightness), while repairing the skin barrier (immediately repairing skin barrier function); thus, it can improve skin luster, brightness, and whiteness and repair the skin barrier in a short period of time after use.

[0110] Example 2: In this embodiment, facial masks with the following formulations were prepared, and their specific compositions are shown in Table 2. In Table 2, the cosmetic composition consists of: 17.5% glycerin, 3% fructose, 0.5% maltose, 0.5% trehalose, 0.5% allantoin, 0.1% glucose, 0.3% p-hydroxyacetophenone, 3% 1,2-hexanediol, 0.5% sodium chloride, appropriate amounts of citric acid and sodium hydroxide to adjust the pH of the composition to 5.5, and water to make up to 100%.

[0111] Table 2: Composition and content (Wt.%) of Groups A, C, and D In this embodiment, active ingredient groups C and D are the experimental groups, and placebo group A is the control group.

[0112] The preparation method of the compositions in Table 2 is the same as that in Example 1, and the preparation method includes: 1. Mix phase A, heat to 50°C, and stir until clear.

[0113] 2. Cool to 25°C, then add phase B to phase A and stir for 2 minutes; 3. Add phase C to A and stir until well mixed; 4. Add phase D to phase A and mix thoroughly; 5. Use phase E to adjust the pH to 5.5.

[0114] The following will test the effect of the above composition on improving skin brightness.

[0115] The specific testing procedure included: recruiting 10 subjects, cleaning the inside of their arms, and having them sit quietly for 30 minutes. Laboratory technicians then marked the test areas on the inside of each subject's forearm. Multiple areas could be marked on the same arm simultaneously, with at least 1 cm between each test area. Each sample was prepared at a dosage of 0.1 g / cm³. 2 Apply the appropriate amount of product to a 3cm x 3cm sheet mask and place it on the inside of the arm for 15 minutes. Before and 15 minutes after application, use the Colorimeter probe from CK (Germany) to measure the skin brightness (L* value) of the corresponding area on the arm.

[0116] Test results are as follows Figure 5 As shown, Figure 5 The test results for skin brightness (L* value) are shown. Figure 5 In the test results, placebo corresponds to the placebo (group A), 1% active ingredient group corresponds to the test results of group C, 0.5% active ingredient group corresponds to the test results of group D, and untreated is the test result of the blank control group that did not receive any treatment.

[0117] Depend on Figure 5 The test results show that after using face masks containing 1% and 0.5% of the cosmetic composition of the present invention, the skin L* value increased by 1.15% and 0.82% respectively compared with the baseline, while the L* value of the placebo group increased by 0.75% compared with the baseline. This indicates that the cosmetic composition of the present invention can bring about an immediate brightening effect.

[0118] In summary, the cosmetic composition provided in this embodiment can improve skin whiteness, radiance, and brightness in a short period of time after use, and better repair the skin barrier.

[0119] The technical solutions provided by the embodiments of this disclosure have been described in detail above. Specific examples have been used in this document to illustrate the principles and implementation methods of the embodiments of this disclosure. The descriptions of the embodiments above are only for helping to understand the principles of the embodiments of this disclosure. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this disclosure. Therefore, the content of this specification should not be construed as a limitation of this disclosure.

Claims

1. A cosmetic composition for instantly brightening skin tone, characterized in that, The cosmetic composition comprises, by weight percentage: Glycerin: 10-25%; Fructose: 1-5%; Maltose: 0.1-1%; Trehalose: 0.1-1%; Allantoin: 0.1-1%; Glucose: 0.01-0.1%; p-Hydroxyacetophenone: 0.1-1%; Based on the total weight of the cosmetic composition.

2. The cosmetic composition according to claim 1, characterized in that, The cosmetic composition further includes: 1,2-Hexanediol: 1-5%, based on the total weight of the cosmetic composition.

3. The cosmetic composition according to claim 1 or 2, characterized in that, The cosmetic composition also includes at least one cosmetic additive.

4. The cosmetic composition according to claim 3, characterized in that, The cosmetic additive is selected from at least one of water, sodium chloride, citric acid, and sodium hydroxide.

5. Use of the cosmetic composition according to any one of claims 1-4 in the preparation of skin care products.

6. The use according to claim 5, characterized in that, The content of the cosmetic composition is 0.5-10%, based on the total weight of the skin care product.

7. Use of a combination of glycerin, fructose, maltose, trehalose, allantoin, glucose and p-hydroxyacetophenone in the preparation of cosmetic compositions having an immediate skin brightening effect.

8. The use according to claim 7, characterized in that, In the cosmetic composition, the content of glycerin is 10-25%, the content of fructose is 1-5%, the content of maltose is 0.1-1%, the content of trehalose is 0.1-1%, the content of allantoin is 0.1-1%, the content of glucose is 0.01-0.1%, and the content of p-hydroxyacetophenone is 0.1-1%, based on the total weight of the cosmetic composition.

9. The use according to claim 8, characterized in that, The cosmetic composition further includes 1,2-hexanediol, wherein the content of 1,2-hexanediol is 1-5% based on the total weight of the cosmetic composition.

10. The use according to claim 8 or 9, characterized in that, The cosmetic composition also includes at least one of water, sodium chloride, citric acid, and sodium hydroxide.

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