Multi-effect firming and soothing composition and use in sensitive skin care

Abstract

The application discloses a multi-effect firming and soothing composition and application thereof in sensitive skin care. The composition contains alfalfa extract, guaiac wood extract, cornflower extract and jujube fruit extract. The four are scientifically compounded to realize synergistic effect. Results show that the composition has a significant TNF-alpha inhibition rate, and the emulsion containing the composition has a significant improvement rate of skin firmness, a* value and lactic acid stinging, which is significantly better than each of the comparative examples and the blank control. The application has firming and soothing and repairing effects, is mild and non-irritating, and is suitable for sensitive skin care.

Description

Technical Field

[0001] This invention relates to the field of cosmetic technology, and more particularly to a multi-effect firming and soothing composition and its application in the care of sensitive skin. Background Technology

[0002] With increasing environmental pollution, a faster pace of life, and the prevalence of improper skincare practices, the proportion of people with sensitive skin is rising year by year. The main characteristics of sensitive skin include impaired skin barrier function, increased neurovascular reactivity, and abnormally active immune inflammatory responses, clinically manifesting as redness, stinging, burning, dryness, tightness, and a decreased tolerance threshold to external stimuli. At the same time, people with sensitive skin also face aging problems such as skin laxity and wrinkles. However, due to their fragile skin barrier and poor tolerance to active ingredients, the high concentrations of acids and retinol derivatives commonly used in traditional anti-aging products are often unsuitable and may even worsen sensitivity symptoms. Therefore, developing a cosmetic composition that effectively tightens and soothes, while also possessing soothing and repairing functions and being safe and friendly to sensitive skin, has become a pressing technical challenge in this field.

[0003] Currently, most skincare products for sensitive skin on the market are single-mindedly focused on soothing and repairing, such as adding only barrier-repairing ingredients like ceramides and panthenol, or relying solely on traditional anti-inflammatory agents like dipotassium glycyrrhizate and bisabolol. While these can relieve immediate discomfort, they lack the ability to intervene in the skin's aging process. Meanwhile, conventional anti-aging products focus on promoting collagen regeneration or accelerating keratinocyte turnover, often neglecting the special physiological state of sensitive skin and easily triggering irritation. Although some products have attempted to simply combine soothing and anti-aging ingredients, the lack of synergistic design between the components not only fails to achieve enhanced efficacy but may also lead to poor results due to antagonistic effects between ingredients or unstable formulation systems.

[0004] Alfalfa extract, guaiac wood extract, cornflower extract, and jujube fruit extract are all known cosmetic ingredients, each possessing certain skincare benefits. However, there are no reports in the existing technology of combining these four extracts in a specific ratio to simultaneously achieve both firming and soothing effects. Each component differs in its target site, mechanism of action, and degree of contribution. How to scientifically formulate these four extracts to form a synergistic network across multiple dimensions, including anti-inflammatory soothing, barrier repair, collagen protection, and firming regeneration, rather than simply adding up their effects, is a technical bottleneck that those skilled in the art need to overcome. Based on this, this invention, through extensive experimental screening and optimization, determined the optimal ratio range of the four components and the primary and secondary relationships of each component in different efficacy dimensions, developing a multi-effect firming and soothing composition that fills the technological gap in firming and soothing products specifically for sensitive skin. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-effect firming and soothing composition and its application in sensitive skin care.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides a composition with multiple firming and soothing effects, the composition comprising alfalfa extract, guaiac wood extract, cornflower extract, and jujube fruit extract.

[0007] Preferably, the composition comprises the following components in parts by weight: Alfalfa extract 0.1-1.5 parts; Guaiac extract 0.1-3 parts; Cornflower extract 0.5-5 parts; Jujube fruit extract 0.05-1 part.

[0008] More preferably, the composition comprises the following components in parts by weight: Alfalfa extract 0.2-1 part; Guaiac extract 0.5-2 parts; Cornflower extract 1-3 parts; Jujube fruit extract, 0.1-0.5 parts.

[0009] More preferably, the composition comprises the following components in parts by weight: 0.5 parts of alfalfa extract; 1 part guaiac wood extract; Two parts of cornflower extract; 0.3 parts of jujube fruit extract.

[0010] In a second aspect, the present invention provides the use of the composition described in the first aspect in the preparation of cosmetics having firming and / or soothing effects.

[0011] Preferably, the cosmetic dosage form includes any one of lotion, serum, cream, spray, and mask.

[0012] Thirdly, the present invention provides a lotion with multiple firming and soothing effects, the lotion containing the composition with multiple firming and soothing effects described in the first aspect.

[0013] Preferably, the emulsion further includes at least one of a humectant, a thickener, an antioxidant, a pH adjuster, a surfactant, and a solvent.

[0014] Preferably, the emulsion comprises the following components: water, carbomer, xanthan gum, allantoin, sodium polyacrylate, hydrogenated lecithin, EDTA-2Na, C14-22 alcohol / C12-20 alkyl glucoside, caprylic / capric triglyceride, butylene glycol, hexanediol, p-hydroxyacetophenone, arginine, and the composition described in the first aspect.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention provides a multi-effect firming and soothing composition, which is composed of alfalfa extract, guaiac wood extract, cornflower extract, and jujube fruit extract.

[0016] Alfalfa extract can significantly reduce the production of reactive oxygen species in keratinocytes and decrease the expression levels of prostaglandin E2 (PGE2) and matrix metalloproteinase-1 (MMP-1). By inhibiting MMP-1, it reduces collagen degradation while promoting collagen synthesis, thus achieving a firming and lifting effect. Furthermore, alfalfa extract can inhibit 11β-HSD1 enzyme, reduce cortisol synthesis, improve skin atrophy and reduced collagen synthesis caused by long-term cortisol exposure, and alleviate skin aging.

[0017] Guaiac wood extract can effectively inhibit the inflammatory response of keratinocytes and reduce the levels of inflammatory factors such as TNF-α. In addition, guaiac wood extract can repair the skin barrier, reduce skin sensitivity, and help the skin regain its resilience.

[0018] Cornflower extract is rich in flavonoids such as rutin and anthocyanins, which have strong anti-inflammatory effects. It is used in cosmetics as a soothing and anti-inflammatory agent, a skin conditioner, and a free radical scavenger. When combined with other plant ingredients, cornflower extract can effectively inhibit the expression of inflammatory factors and eliminate excess free radicals, thus exerting excellent anti-aging effects.

[0019] Vitamin C and other components in jujube fruit extract are key cofactors in collagen synthesis, helping to maintain skin structure and elasticity. They can also reduce the expression of UV-induced matrix metalloproteinases MMP-2 and MMP-9, protecting collagen from degradation. Furthermore, the flavonoids in jujube fruit can downregulate the expression of inflammatory factors such as TNF-α and hyaluronidase activity, thus exerting a soothing effect.

[0020] Of the four ingredients, alfalfa extract reduces cortisol synthesis and MMP-1 expression by inhibiting 11β-HSD1 enzyme activity, thereby reducing collagen degradation and simultaneously promoting collagen synthesis, exerting a firming and lifting effect from both hormonal regulation and matrix metabolism levels. Jujube fruit extract provides vitamin C, a key cofactor in collagen synthesis, and inhibits UV-induced MMP-2 and MMP-9 expression, further strengthening the collagen protective barrier and forming a synergistic collagen "promotion-protection" pathway with alfalfa extract. Guaiac wood extract and cornflower extract both effectively inhibit the expression of inflammatory factors such as TNF-α. Cornflower extract also efficiently scavenge excess free radicals, while guaiac wood extract repairs the skin barrier and reduces skin sensitivity. Together, they alleviate inflammatory responses and create a stable internal environment for skin repair. Through a synergistic mechanism of anti-inflammatory soothing, barrier repair, collagen protection, and firming and regeneration, these four ingredients offer both soothing and firming effects without causing irritation, making them suitable for the preparation of skincare products for sensitive skin and showing promising prospects for industrial application. Detailed Implementation

[0021] To better illustrate the purpose, technical solution, and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0022] The sources of some of the raw materials used in this invention are as follows: The alfalfa extract was purchased from Silab under the trade name INCLUSIUM®. Guaiac extract was purchased from Jiangsu Ruiting Biotechnology Co., Ltd., and its trade name is Guaiac extract. Cornflower extract was purchased from Zhenghe (Guangzhou) Biotechnology Co., Ltd., and its trade name is Cornflower Extract. The jujube fruit extract was purchased from Shaanxi Tianyu Kangze Biotechnology Co., Ltd., and its trade name is Jujube Fruit Extract.

[0023] All other raw materials, testing equipment, and reagents were commercially available.

[0024] Preparation of a composition with multiple firming and soothing effects (hereinafter referred to as the composition) Composition 1 Composed of the following components by mass: 0.5 parts of alfalfa extract; 1 part guaiac wood extract; Two parts of cornflower extract; Jujube fruit extract 0.3 parts; Preparation method: Mix the above raw materials evenly at 25°C, seal and store in the dark.

[0025] Composition 2 Composed of the following components by mass: 0.2 parts of alfalfa extract; Guaiac wood extract 0.5 parts; One part cornflower flower extract; 0.1 part of jujube fruit extract; The preparation method is the same as that of composition 1.

[0026] Composition 3 Composed of the following components by mass: 1 part alfalfa extract; Two portions of guaiac wood extract; 3 parts cornflower flower extract; 0.5 parts of jujube fruit extract; The preparation method is the same as that of composition 1.

[0027] Composition 4 Composed of the following components by mass: 0.1 part of alfalfa extract; Guaiac wood extract 0.1 part; Cornflower extract 0.5 parts; Jujube fruit extract 0.05 parts; The preparation method is the same as that of composition 1.

[0028] Composition 5 Composed of the following components by mass: 1.5 parts of alfalfa extract; 3 parts of guaiac wood extract; 5 parts cornflower extract; 1 part of jujube fruit extract; The preparation method is the same as that of composition 1.

[0029] Comparative Example 1: Unlike Composition 1, it lacks alfalfa extract. The missing mass fractions are made up by guaiac extract, cornflower extract, and jujube fruit extract in a mass ratio of 1:2:0.3. The mass fractions of the remaining raw materials and the preparation methods are the same as those of Composition 1.

[0030] Comparative Example 2: Unlike Composition 1, it lacks guaiac extract. The missing mass fractions are made up by alfalfa extract, cornflower extract, and jujube fruit extract in a mass ratio of 0.5:2:0.3. The mass fractions of the remaining raw materials and the preparation methods are the same as those of Composition 1.

[0031] Comparative Example 3: Unlike Composition 1, it lacks cornflower extract. The missing mass fractions are made up by alfalfa extract, guaiac extract, and jujube fruit extract in a mass ratio of 0.5:1:0.3. The mass fractions of the remaining raw materials and the preparation methods are the same as those of Composition 1.

[0032] Comparative Example 4: Unlike composition 1, this composition lacks jujube fruit extract. The missing mass fraction is made up by alfalfa extract, guaiac wood extract, and cornflower extract in a mass ratio of 0.5:1:2. The mass fractions of the remaining raw materials and the preparation method are the same as those in composition 1.

[0033] Comparative Example 5 Composed of the following components by mass: Two portions of alfalfa extract; Guaiac wood extract 0.3 parts; Cornflower extract 0.5 parts; 1 part of jujube fruit extract; The preparation method is the same as that of composition 1.

[0034] Preparation of a lotion with multiple firming and soothing effects (hereinafter referred to as lotion) The specific ingredients and mass percentages of the lotion with multiple firming and soothing effects are shown in Table 1.

[0035] Table 1. Specific ingredients and mass percentage of lotions with multiple firming and soothing effects.

[0036] Note: "-" indicates that it does not contain.

[0037] Emulsion ①: Unlike emulsion 1, composition 1 is replaced with the same mass percentage as comparative example 1, and the mass percentages of the remaining raw materials are the same as those of emulsion 1.

[0038] Emulsion ②: Unlike emulsion 1, composition 1 is replaced by the same mass percentage as comparative example 2, while the mass percentages of the remaining raw materials are the same as those in emulsion 1.

[0039] Emulsion ③: Unlike emulsion 1, composition 1 is replaced by the same mass percentage of comparative example 3, while the mass percentages of the remaining raw materials are the same as those of emulsion 1.

[0040] Emulsion ④: Unlike Emulsion 1, Comparative Example 4 is used to replace Composition 1 by the same mass percentage, while the mass percentages of the remaining raw materials are the same as those in Emulsion 1.

[0041] Emulsion ⑤: Unlike emulsion 1, composition 1 is replaced by the same mass percentage as comparative example 5, while the mass percentages of the remaining raw materials are the same as those in emulsion 1.

[0042] The preparation method of emulsion 1 is as follows: S1. After mixing phase A, heat to 80°C and homogenize at 1000 rpm for 5 minutes until evenly dispersed. After homogenization, keep warm for later use to obtain pre-prepared component A. S2. After mixing phase B, heat to 80°C and homogenize at 1000 rpm for 5 minutes. After homogenization, keep warm for later use to obtain pre-prepared component B. S3. Mix phase C and heat and stir at 60°C until dissolved to obtain pre-prepared component C; mix phase D and phase E separately and stir until dissolved to obtain pre-prepared components D and E; S4. Heat the pre-formulated component A obtained in S1 to 85°C, add the pre-formulated component B at 350 rpm, mix evenly, then cool down to 60°C, add the pre-formulated component C and stir to mix, continue cooling down to 45°C, add the pre-formulated component D and pre-formulated component E, stir evenly and then discharge to obtain the emulsion.

[0043] The preparation methods for emulsions 2-5 and emulsions ①-⑤ are the same as those for emulsion 1.

[0044] The method for preparing blank emulsion is as follows: S1. After mixing phase A, heat to 80°C and homogenize at 1000 rpm for 5 minutes until evenly dispersed. After homogenization, keep warm for later use to obtain pre-prepared component A. S2. After mixing phase B, heat to 80°C and homogenize at 1000 rpm for 5 minutes. After homogenization, keep warm for later use to obtain pre-prepared component B. S3. Mix phase C and heat and stir at 60°C until dissolved to obtain pre-prepared component C; mix phase D and stir until dissolved to obtain pre-prepared component D. S4. Heat the pre-formulated component A obtained in S1 to 85°C, add the pre-formulated component B at 350 rpm, mix evenly, then cool down to 60°C, add the pre-formulated component C and stir to mix, continue cooling down to 45°C, add the pre-formulated component D, stir evenly, and then discharge to obtain the emulsion.

[0045] Efficacy test Test Example 1: Anti-inflammatory effect test of the composition Test sample: Sample group: DMEM medium containing 0.5 wt% of the composition and 1 μg / mL LPS; Positive control group: DMEM medium containing 0.001 wt% dexamethasone and 1 μg / mL LPS; Model group: DMEM medium containing 1 μg / mL LPS; Control group: DMEM medium; Experimental method: S1, Plating: Log-phase RAW264.7 cells were seeded into 24-well plates at a cell density of 2 × 10⁻⁶ cells / well. 5 Cells / mL, 0.5mL per well. After the plate is prepared, mark the cell plate cover (divided into blank control group, model group, positive control group, and experimental group). Incubate in a carbon dioxide incubator for 24 h. Each group has three replicates. S2. Sample processing: After cell incubation for 24 hours, aspirate the supernatant and add 0.5 mL of each of the following samples: S3. Detection of inflammatory factors in cell supernatants of each group: After treating cells with the sample for 24 hours, the supernatant was pipetted into centrifuge tubes, centrifuged at 1000 rpm for 5 minutes, the precipitate was discarded, and the supernatant was collected. The changes in inflammatory factors in the supernatant were detected using the Xinbosheng TNF-α inflammatory factor detection kit. The results are expressed as TNF-α inhibition rate. The formula for calculating the TNF-α inhibition rate is as follows: TNF-α inhibition rate (%) = [(TNF-α level in model group - TNF-α level in experimental group) / TNF-α level in model group] × 100%.

[0046] The experimental results are shown in Table 2.

[0047] Table 2 Results of anti-inflammatory activity tests of the compositions Group TNF-α inhibition rate / % Composition 1 56.3 Composition 2 53.7 Composition 3 54.1 Composition 4 51.2 Composition 5 51.5 Comparative Example 1 28.4 Comparative Example 2 14.6 Comparative Example 3 23.8 Comparative Example 4 19.2 Comparative Example 5 21.5 Positive control group 81.7 As shown in Table 2, the TNF-α inhibition rates of compositions 1-5 were all above 50%, with composition 1 reaching 56.3%, which was significantly higher than that of the control groups. This indicates that the four components have a significant synergistic anti-inflammatory effect under specific ratios. The comparative results analyzed the contribution of each component to the anti-inflammatory effect: Comparative Example 2 (lacking guaiac extract) showed the largest decrease in TNF-α inhibition rate at only 14.6%, indicating that guaiac extract is the core component for the composition's anti-inflammatory effect. This is consistent with its mechanism of action, which effectively inhibits keratinocyte inflammatory response and reduces the content of inflammatory factors such as TNF-α. Comparative Example 4 (lacking jujube fruit extract) showed the second largest decrease in TNF-α inhibition rate at 19.2%, indicating that flavonoids in jujube fruit extract make a significant contribution to downregulating TNF-α expression. Comparative Example 3 (lacking cornflower extract) showed the smallest decrease in TNF-α inhibition rate at 23.8%, with its rich flavonoids such as rutin and anthocyanins playing an auxiliary role in anti-inflammation. Comparative Example 1 (lacking alfalfa extract) showed the smallest decrease in TNF-α inhibition rate at 28.4%, indicating that alfalfa extract has a relatively small direct contribution to anti-inflammation, and its main effect is focused on firming and soothing. Furthermore, although Comparative Example 5 contained all four components, its TNF-α inhibition rate was only 21.5% due to the imbalance in the ratio, further demonstrating that the components need to be in a reasonable ratio to exert a synergistic effect.

[0048] Test Example 2: Lotion Firming and Soothing Effect Test Test samples: Emulsions 1-5, Emulsions ①-⑤, and blank emulsion.

[0049] Test grouping: 55 volunteers aged 18-45 were selected and randomly divided into 11 groups of 5 people each. The test sample was randomly assigned to each group, and each group used one test sample.

[0050] Test method: Volunteers used the lotion twice daily, morning and evening, after cleansing and moisturizing. Samples were taken at a concentration of 2 mg / cm³. 2 Apply the product evenly to the entire face and gently massage until fully absorbed. Follow up on days 0 and 28 to conduct various indicator tests. On days 0 and 28, subjects did not apply any skincare products. After cleansing, they sat quietly for 30 minutes in a temperature- and humidity-controlled room with a temperature of 21±1℃ and a humidity of 50±10%. The F4 value of facial skin firmness was measured using a Cutometer MPA580. Facial images were taken using a Visia-7, and the exported red area images were analyzed to obtain the a* value. The improvement of each indicator was analyzed and calculated, and the data were averaged. The calculation method is as follows: Skin firmness improvement rate (%) = (F4 value before use - F4 value after 28 days of use) / F4 value before use × 100% Skin a* value improvement rate (%) = (a* value before use - a* value after 28 days of use) / a* value before use × 100%.

[0051] The experimental results are shown in Table 3.

[0052] Table 3. Test results of the firming and soothing effects of the lotion. Group Skin firmness improvement rate / % a* value improvement rate / % Emulsion 1 22.6 17.3 Emulsion 2 19.8 15.5 Emulsion 3 21.1 16.9 Emulsion 4 15.3 13.2 Emulsion 5 17.7 14.4 Emulsion ① 6.2 5.8 Emulsion ② 8.7 4.7 Emulsion ③ 8.3 5.2 Emulsion ④ 7.9 4.6 Emulsion ⑤ 7.1 5.3 Blank lotion 4.3 2.1 As shown in Table 3, in terms of skin firmness, the skin firmness improvement rate of lotions 1-5 (including the complete composition) was 15.3%~22.6%, which was significantly higher than that of lotions ①-⑤ (6.2%~8.7%) and blank lotion (4.3%), indicating that the composition of the present invention has excellent firming effect. From the perspective of the impact of each comparative sample on firmness, lotion ① (lacking alfalfa extract) showed the lowest improvement rate in firmness, at only 6.2%, significantly lower than the other comparative sample groups. This indicates that alfalfa extract is the key component for the composition to exert its firming effect, which is closely related to its multiple mechanisms of reducing cortisol synthesis by inhibiting 11β-HSD1 enzyme, reducing MMP-1 expression to decrease collagen degradation, and promoting collagen synthesis. In contrast, lotions ② (lacking guaiac extract), ③ (lacking cornflower extract), and ④ (lacking jujube fruit extract) showed firmness improvement rates of 8.7%, 8.3%, and 7.9%, respectively, with relatively small decreases and little difference, indicating that alfalfa extract had a significantly greater impact on firmness than guaiac extract, cornflower extract, and jujube fruit extract. Regarding the a* value improvement rate (reflecting the improvement in skin redness), lotions 1-5 showed an improvement rate of 13.2%–17.3%, significantly better than the 4.6%–5.8% of lotions ①-⑤ and the 2.1% of the blank lotion. Among them, emulsion ② (lacking guaiac extract) and emulsion ④ (lacking jujube fruit extract) showed the lowest a* value improvement rates, at 4.7% and 4.6%, respectively. Emulsion ① (lacking alfalfa extract) and emulsion ③ (lacking cornflower extract) showed relatively higher a* value improvement rates, at 5.8% and 5.2%, respectively. This indicates that guaiac extract and jujube fruit extract contributed more to soothing redness than cornflower extract and alfalfa extract. This is consistent with the efficacy mechanism of guaiac extract in repairing the skin barrier and reducing skin sensitivity, and the effect of flavonoids in jujube fruit extract in downregulating the expression of inflammatory factors and hyaluronidase activity. In summary, the four components, through a synergistic mechanism involving anti-inflammatory soothing, barrier repair, collagen protection, and firming and regeneration, enable the composition to possess both excellent firming and soothing effects.

[0053] Test Example 3: Sensitive Skin Suitability Test Using lotion 1, lotions ①-⑤, and a blank lotion as test samples, the suitability of the product for sensitive skin was determined by assessing the improvement rate of lactic acid stinging before and after use by individuals with sensitive skin.

[0054] Volunteer selection: 35 people with sensitive skin were selected as volunteers, with 5 people in each group and each group corresponding to a test sample.

[0055] Test procedure: The test was conducted on the nasolabial folds of volunteers. 50 μL of 10wt% lactic acid solution was dropped onto a single layer of filter paper with a diameter of 0.8 cm. The subjects were asked about their stinging sensation at 0.5 min and 2.5 min. The subjects were scored using a 4-point scale (0 points for no stinging, 1 point for mild stinging, 2 points for moderate stinging, and 3 points for severe stinging).

[0056] Sample usage: Volunteers in the sample group applied the sample to their entire face, while volunteers in the blank control group used the blank lotion. Volunteers applied the product twice daily, morning and evening, applying 1 mL of lotion each time, for two consecutive weeks. After two weeks of use, the above test steps were repeated.

[0057] Record the lactic acid stinging scores of volunteers before and after 2 weeks of use, and calculate the improvement rate of lactic acid stinging in volunteers.

[0058] The improvement rate of lactic acid stinging (%) was calculated as follows: (sum of lactic acid stinging scores before use - sum of lactic acid stinging scores after 2 weeks of use) / sum of lactic acid stinging scores before use × 100%. The sum of lactic acid stinging scores = the average lactic acid stinging score over 0.5 minutes + the average stinging score over 2.5 minutes.

[0059] The higher the improvement rate of lactic acid stinging, the better the repair effect of the sample, and the more suitable the product is for people with sensitive skin.

[0060] The experimental results are shown in Table 4.

[0061] Table 4 Results of the test for sensitivity skin Group Improvement rate of lactic acid stinging / % Emulsion 1 72.2 Emulsion ① 47.1 Emulsion ② 38.1 Emulsion ③ 50.0 Emulsion ④ 46.7 Emulsion ⑤ 42.1 Blank lotion 15.8 As shown in Table 4, the improvement rate of lactic acid stinging in lotion 1 was as high as 72.2%, far exceeding the 15.8% of the blank lotion. This indicates that the composition of the present invention can significantly improve the lactic acid stinging symptoms of people with sensitive skin, and has excellent soothing and repairing effects, making it suitable for sensitive skin care. The improvement rates of lactic acid stinging in each comparative lotion ranged from 38.1% to 50.0%, all higher than the blank lotion, but significantly lower than lotion 1, indicating that the complete combination of the four components has an irreplaceable synergistic effect on sensitive skin repair. Specifically, lotion ② (lacking guaiac extract) had the lowest improvement rate (38.1%), which is consistent with the core efficacy of guaiac extract in repairing the skin barrier and reducing skin sensitivity. The loss of barrier function directly affects the skin's ability to resist external stimuli. Lotion ④ (lacking jujube fruit extract) had an improvement rate of 46.7%, and the contribution of flavonoids in jujube fruit extract to inhibiting hyaluronidase activity and downregulating inflammatory factors cannot be ignored. Lotion ⑤ (imbalanced ratio) had an improvement rate of 42.1%, further verifying the importance of a reasonable ratio for efficacy. Lotion ① (lacking alfalfa extract) and lotion ③ (lacking cornflower extract) had relatively high improvement rates of 47.1% and 50.0%, respectively, indicating that although their direct contribution to soothing and repairing is not as great as that of guaiac and jujube, they still participate in synergistic effects through anti-inflammatory and antioxidant pathways. In summary, the four ingredients in the composition of this invention achieve highly effective soothing and repairing of sensitive skin through a multi-target synergistic mechanism: guaiac extract repairs the skin barrier, cornflower extract scavenges free radicals, jujube fruit extract inhibits inflammatory factors and hyaluronidase, and alfalfa extract improves the skin microenvironment. This is achieved under the premise of gentleness and non-irritation.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A composition having multiple firming and soothing effects, characterized in that, The composition includes alfalfa extract, guaiac wood extract, cornflower extract, and jujube fruit extract.

2. The composition according to claim 1, characterized in that, The composition comprises the following components in parts by weight: Alfalfa extract 0.1-1.5 parts; Guaiac extract 0.1-3 parts; Cornflower extract 0.5-5 parts; Jujube fruit extract 0.05-1 part.

3. The composition according to claim 2, characterized in that, The composition comprises the following components in parts by weight: Alfalfa extract 0.2-1 part; Guaiac wood extract 0.5-2 parts; Cornflower extract 1-3 parts; Jujube fruit extract, 0.1-0.5 parts.

4. The use of a composition according to any one of claims 1-3 in the preparation of a cosmetic having firming and / or soothing effects.

5. The application according to claim 4, characterized in that, The cosmetic dosage forms include any one of lotion, serum, cream, spray, and mask.

6. A lotion with multiple firming and soothing effects, characterized in that, The emulsion comprises the multi-effect firming and soothing composition according to any one of claims 1-3.

7. The emulsion according to claim 6, characterized in that, The emulsion also includes at least one of the following: a humectant, a thickener, an antioxidant, a pH adjuster, a surfactant, and a solvent.

8. The emulsion according to claim 6 or 7, characterized in that, The emulsion comprises the following components: water, carbomer, xanthan gum, allantoin, sodium polyacrylate, hydrogenated lecithin, EDTA-2Na, C14-22 alcohol / C12-20 alkyl glucoside, caprylic / capric triglyceride, butylene glycol, hexanediol, p-hydroxyacetophenone, arginine, and the composition of any one of claims 1-3.

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