Composition, skin care product and method of preparation having skin smoothing and firming functions

Abstract

The present application relates to a composition with skin smoothing and tightening function, a skin care product and a preparation method. The composition with skin smoothing and tightening function comprises a yeast / rice fermentation product filtrate, a hydroxypropyl tetrahydropyran triol and glycogen. The composition has good skin barrier repair effect, can significantly improve the skin roughness and elasticity weakened skin problems, and improve the skin smoothness and tightness. In addition, the composition has clear effective components and simple composition, and the product production process is easy to control and can be mass produced.

Description

Technical Field

[0001] This application relates to the field of skin care technology, and in particular to a composition, skin care product, and preparation method that have skin smoothing and firming functions. Background Technology

[0002] As we age, our skin exhibits signs of aging, primarily manifested as decreased smoothness and elasticity, and increased roughness. Since facial skin is in direct contact with the external environment, this environment inevitably influences its condition. Therefore, protecting the skin and minimizing environmental damage is crucial, and this requires safeguarding the skin barrier. During this contact, the skin barrier can be damaged to varying degrees, resulting in changes in skin roughness and elasticity. This is especially true for people with sensitive skin, whose skin barriers are more easily compromised, making them more susceptible to harm. Therefore, when choosing skincare products, it is essential to consider those that reduce skin roughness, improve elasticity and smoothness, and repair the skin barrier.

[0003] Many commercially available daily cosmetics claiming to tighten skin and reduce roughness have certain drawbacks. For example, the domestic patent application CN202010385535.0 uses unclear active ingredients, lacks sufficient safety, and has excessively high hardware costs, making large-scale production difficult. Another example is the domestic patent application CN201811515102.1, which uses specific active ingredients, but the composition of these ingredients is extremely complex, and the manufacturing process is cumbersome, also hindering large-scale production and application. Therefore, there is an urgent need to develop a product with a simple active ingredient composition, a simple production process, and effective skin-smoothing and firming properties. Summary of the Invention

[0004] Based on this, this application provides a composition, skin care product, and preparation method that have skin smoothing and firming functions, with simple and clearly defined active ingredients and an easy-to-operate production process.

[0005] One embodiment of this application discloses a composition having skin-smoothing and firming functions, comprising: yeast / rice fermentation product filtrate, hydroxypropyl tetrahydropyranotriol, and glycogen.

[0006] In one embodiment, the mass ratio of the yeast / rice fermentation product filtrate, the hydroxypropyltetrahydropyranotriol, and the glycogen is (0.01~3):(0.1~10):(0.01~2).

[0007] In one embodiment, the preparation of the yeast / rice fermentation product filtrate includes the following steps:

[0008] After soaking and steaming the rice into cooked rice, water is added to the cooked rice and then cooled.

[0009] A suspension containing yeast strains is inoculated into the rice, fermented, filtered, and the filtrate is collected.

[0010] This application also provides a skin care product, the raw materials of which include the composition as described in any of the above embodiments and other raw materials.

[0011] In one embodiment, the skincare product includes a face cream.

[0012] In one embodiment, the mass of the yeast / rice fermentation product filtrate in the face cream accounts for 0.01% to 3% of the total mass of the face cream ingredients, the mass of the hydroxypropyl tetrahydropyranotriol accounts for 0.1% to 10% of the total mass of the face cream ingredients, and the mass of the glycogen accounts for 0.01% to 2% of the total mass of the face cream ingredients.

[0013] In one embodiment, the other raw materials also include one or more of solvents, skin care agents, thickeners, chelating agents, skin feel modifiers, preservatives, solubilizers, and fragrances.

[0014] In one embodiment, the solvent includes water.

[0015] In one embodiment, the skin care agent includes one or more of phytosterols, squalane, tocopheryl acetate, and behenol.

[0016] In one embodiment, the thickener includes one or more of sodium acrylate / sodium acryloyldimethyl taurate copolymer, xanthan gum, carboxymethyl cellulose, kaolin, and titanium dioxide.

[0017] In one embodiment, the chelating agent comprises EDTA-2NA.

[0018] In one embodiment, the skin feel modifier comprises isononyl isononanoate.

[0019] In one embodiment, the preservative includes one or more of phenoxyethanol and pentanediol.

[0020] In one embodiment, the solubilizer comprises PEG-100 stearate.

[0021] In one embodiment, the fragrance includes a daily-use fragrance.

[0022] An embodiment of this application also provides a method for preparing a skin care product as described in any of the above embodiments, comprising the following steps:

[0023] The ingredients in the skincare products are categorized into water-soluble ingredients, fat-soluble ingredients, and emulsifying ingredients.

[0024] The water-soluble raw materials are mixed to prepare a first mixture;

[0025] The fat-soluble raw material is added to the first mixture, and the mixture is heated and dispersed to prepare a second mixture.

[0026] The emulsifying raw material is added to the second mixture, and the mixture is heated and emulsified to prepare the skin care product.

[0027] In one embodiment, the temperatures of the first heating and the second heating are each independently 55°C to 65°C.

[0028] The composition provided in this application comprises yeast / rice fermentation product filtrate, hydroxypropyl tetrahydropyranotriol, and glycogen, and has excellent skin barrier repair effects. It can significantly improve skin problems such as roughness and reduced elasticity, and enhance skin smoothness and firmness. In addition, the composition has clearly defined active ingredients and a simple composition, and the product manufacturing process is easy to control and can be mass-produced. Detailed Implementation

[0029] To facilitate understanding of this application, a more comprehensive description of the application will be provided below with reference to embodiments. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0030] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] In this application, the technical features described in an open-ended manner include both closed technical solutions consisting of the listed features and open technical solutions that include the listed features.

[0032] One embodiment of this application discloses a composition having skin-smoothing and firming functions, comprising: yeast / rice fermentation product filtrate, hydroxypropyl tetrahydropyranotriol, and glycogen.

[0033] Yeast / rice fermentation product filtrate is a product obtained by fermenting carefully selected rice after steaming and inoculating it with food-grade yeast. It contains a variety of natural skin-nourishing ingredients and performs well in moisturizing, barrier repair, and hydration. In addition, yeast / rice fermentation product filtrate also promotes cell proliferation, which is beneficial for promoting collagen regeneration in the skin, thereby improving skin elasticity and firming the skin.

[0034] Hydroxypropyltetrahydropyranotriol, also known as bosine, is a xylose derivative extracted and isolated from beech trees. It has anti-aging effects, can effectively promote the expression of proteoglycans, help the epidermis and dermis to connect tightly, help the dermis maintain elasticity, and promote the regeneration of damaged tissue.

[0035] Glycogen is a high molecular weight polysaccharide composed of α-1,4-glycosidic bonds and α-1,6-glycosidic bonds, with a molecular weight of 10. 6 Da~10 9 Glycogen, also known as biological glycogen, is mainly found in skeletal muscle and the liver. It is prepared by sequentially enzymatically hydrolyzing corn starch three times using isoamylase, short-chain branched amylase, branching enzyme AqBE, and maltose-transferase TaqAM, followed by purification and spray drying of the resulting products. Glycogen promotes cell vitality and has anti-aging effects. It can also effectively promote the production of hyaluronic acid and ceramides, thus achieving multiple protective and beautifying effects on the skin, including anti-wrinkle, whitening, and moisturizing.

[0036] The composition of this application includes yeast / rice fermentation product filtrate, hydroxypropyl tetrahydropyranotriol, and glycogen. The three components work synergistically. When applied to the skin and used consistently, it can effectively improve various skin problems, such as repairing the skin barrier, reducing skin roughness, and making the skin smoother, more delicate, firmer, and more elastic.

[0037] In one embodiment, the mass ratio of yeast / rice fermentation product filtrate, hydroxypropyltetrahydropyranotriol, and glycogen is (0.01~3):(0.1~10):(0.01~2). Within this mass ratio range, the yeast / rice fermentation product filtrate, hydroxypropyltetrahydropyranotriol, and glycogen can exert a better synergistic effect, which is more conducive to reducing skin roughness and firming the skin. It is understood that the specific mass of the yeast / rice fermentation product filtrate, hydroxypropyltetrahydropyranotriol, and glycogen is not particularly limited, and any content that meets the above-mentioned mass ratio range should be considered within the scope of protection of this application. Preferably, the mass ratio of yeast / rice fermentation product filtrate, hydroxypropyltetrahydropyranotriol, and glycogen is (1.2~3):(0.1~5.2):(1.28~2).

[0038] In one embodiment, the preparation of yeast / rice fermentation product filtrate includes the following steps:

[0039] After soaking and steaming the rice, add water to the rice and let it cool.

[0040] A suspension containing yeast strains is inoculated into rice, fermented, filtered, and the filtrate is collected.

[0041] The above-mentioned preparation process of yeast / rice fermentation product filtrate has high stability, can be carried out on a large scale, and the production process is easy to control and operate.

[0042] This application also provides a skincare product, the raw materials of which include the composition as described in any of the above embodiments and other raw materials. Using the above-described composition comprising yeast / rice fermentation product filtrate, hydroxypropyltetrahydropyranotriol, and glycogen as the main raw material of the skincare product, the composition can serve as the functional ingredient of the skincare product, achieving multiple skincare effects such as reducing skin roughness, improving skin elasticity, and repairing the skin barrier through the synergistic effect of yeast / rice fermentation product filtrate, hydroxypropyltetrahydropyranotriol, and glycogen.

[0043] Understandably, the skincare products provided in this application may be conventional skincare products in the art, such as face creams, lotions, etc.

[0044] In one embodiment, the skincare product includes a face cream.

[0045] Furthermore, in the face cream, the mass of yeast / rice ferment filtrate accounts for 0.01% to 3% of the total mass of the face cream ingredients, the mass of hydroxypropyltetrahydropyranotriol accounts for 0.1% to 10% of the total mass of the face cream ingredients, and the mass of glycogen accounts for 0.01% to 2% of the total mass of the face cream ingredients. Controlling the specific dosage ranges of yeast / rice ferment filtrate, hydroxypropyltetrahydropyranotriol, and glycogen in the face cream ingredients can ensure the safety of the dosage and has good effects in promoting barrier repair, reducing skin roughness, and restoring skin elasticity. Preferably, in the face cream, the mass of yeast / rice ferment filtrate accounts for 0.6% to 3% of the total mass of the face cream ingredients, the mass of hydroxypropyltetrahydropyranotriol accounts for 0.1% to 5.2% of the total mass of the face cream ingredients, and the mass of glycogen accounts for 0.4% to 2% of the total mass of the face cream ingredients. More preferably, in the face cream, the mass of yeast / rice fermentation product filtrate accounts for 1.2% to 3% of the total mass of the face cream raw materials, the mass of hydroxypropyl tetrahydropyrantriol accounts for 0.1% to 5.2% of the total mass of the face cream raw materials, and the mass of glycogen accounts for 1.28% to 2% of the total mass of the face cream raw materials.

[0046] Furthermore, other raw materials can be other common raw materials in face cream ingredients. This application does not specifically limit the specific types of other raw materials. As long as the raw materials can be used to make face cream and are not incompatible with the properties of the composition provided in this application, they should be considered within the scope of protection of this application. For example, other raw materials may include, but are not limited to, one or more of solvents, skin care agents, thickeners, chelating agents, skin feel modifiers, preservatives, solubilizers, and fragrances. Among them, solvents may include, but are not limited to, water; skin care agents may include, but are not limited to, one or more of phytosterols, squalane, tocopheryl acetate, and behenol; thickeners may include, but are not limited to, one or more of sodium acrylate / sodium acryloyl dimethyl taurate copolymer, xanthan gum, carboxymethyl cellulose, kaolin, and titanium dioxide; chelating agents may include, but are not limited to, EDTA-2NA; skin feel modifiers may include, but are not limited to, isononyl isononanoate; preservatives may include, but are not limited to, one or more of phenoxyethanol and pentylene glycol; solubilizers may include, but are not limited to, PEG-100 stearate; and fragrances may include, but are not limited to, daily fragrances.

[0047] Understandably, the skincare products provided in this application can be prepared by any conventional preparation method in the art.

[0048] One embodiment of this application provides a preparation method, including the following steps S110 to S130.

[0049] The ingredients in skincare products are classified into water-soluble ingredients, fat-soluble ingredients, and emulsifying ingredients.

[0050] Step S110: Mix the water-soluble raw materials to prepare the first mixture.

[0051] Step S120: Add fat-soluble raw materials to the first mixture, perform first heating and dispersion, and prepare the second mixture.

[0052] Step S130: Add emulsifying raw materials to the second mixture, perform a second heating and emulsification, and prepare a skin care product.

[0053] Furthermore, the skincare product is a face cream, and its ingredients include:

[0054] Phase A: Water, sodium acrylate / sodium acryloyl dimethyl taurate copolymer, xanthan gum, carboxymethyl cellulose, phenoxyethanol, pentylene glycol, EDTA-2NA;

[0055] Phase B: Kaolin, titanium dioxide;

[0056] Phase C: Phytosterols, Squalane, Tocopheryl Acetate, Behenol, Isononyl Isononanoate;

[0057] Phase D: PEG-100 stearate, daily fragrance;

[0058] Phase E: The composition with skin smoothing and firming function provided in any of the above embodiments;

[0059] The raw materials in phase A are water-soluble, the raw materials in phases B, C, and E are fat-soluble, and the raw materials in phase D are emulsifying.

[0060] Furthermore, the temperatures of the first and second heating are each independently between 55°C and 65°C. Within this temperature range, the raw materials can be effectively dispersed. Understandably, the temperatures of the first and second heating can be, for example, but not limited to, independently 55°C, 60°C, 65°C, etc.

[0061] The yeast / rice ferment filtrate, hydroxypropyl tetrahydropyrantriol, and glycogen in the skincare products provided in this application have clear sources, controllable raw material quality, and clearly defined active ingredients, which can ensure that the skincare products have stable and reliable product quality.

[0062] Furthermore, the preparation method of the skin care products provided in this application is simple, the process is controllable, the method is clear, the preparation process is highly stable, it is easy to promote and mass-produce, the quality of the skin care products is guaranteed, and it can ensure that the skin care products have multiple skin care effects such as repairing the skin barrier, reducing skin roughness, improving skin elasticity, and promoting skin firmness and smoothness.

[0063] The following detailed embodiments further illustrate the skin-smoothing and firming composition, skincare product, and preparation method of this application. While the following embodiments are specific, it is understood that other embodiments are not limited to these examples. Unless otherwise specified, the instruments, reagents, and materials involved in the following specific embodiments are all conventional instruments, reagents, and materials already available in the prior art and can be obtained through legitimate commercial channels. Unless otherwise specified, the experimental methods and detection methods involved in the following embodiments are all conventional experimental methods and detection methods already available in the prior art.

[0064] The manufacturer of hydroxypropyl tetrahydropyranotriol is Shandong Siyang Biotechnology Co., Ltd.

[0065] The manufacturer of glycogen is Qi Yi Biotechnology (Shanghai) Co., Ltd.

[0066] Yeast / rice fermentation products are prepared by the following method:

[0067] (1) Selected edible yeasts were inoculated into sterilized activation culture medium and cultured at 28°C for 48 hours to prepare activated strains for later use.

[0068] (2) Under aseptic conditions, the activated strain prepared in step (1) is transferred to the sterilized expansion medium using an inoculation loop, placed in a constant temperature shaker, and cultured for 48 hours at 150 r / min and 28℃ to prepare the expanded strain.

[0069] (3) Inoculate the expanded strain prepared in step (2) into MRS medium with an inoculation amount of 3% and continue to culture at 28°C for 48 hours to prepare a strain suspension.

[0070] (4) Wash 20g of selected Akita rice with water, soak for 24 hours, take it out and steam it in a pot, put it in a bottle, add deionized water and let it stand and cool to room temperature, while making the rice grains loose, to prepare cooked rice.

[0071] (5) Take 15% of the mass of the rice grains prepared in step (4) and add the bacterial suspension prepared in step (3) to the rice grains. Cultivate and ferment at 37°C for 2 days to prepare fermentation liquid.

[0072] (6) The fermentation broth prepared in step (5) is allowed to stand, filtered, and the clarified liquid is collected to obtain yeast / rice fermentation product filtrate.

[0073] Example 1

[0074] (1) The ingredients of face cream include:

[0075] Phase A: Water, sodium acrylate / sodium acryloyl dimethyl taurate copolymer, xanthan gum, carboxymethyl cellulose, phenoxyethanol, hexanediol, EDTA-2NA;

[0076] Phase B: Kaolin, titanium dioxide;

[0077] Phase C: Phytosterols, Squalane, Tocopheryl Acetate, Behenol, Isononyl Isononanoate;

[0078] Phase D: PEG-100 stearate, daily fragrance;

[0079] Phase E: A composition that promotes skin smoothness and barrier repair, comprising: yeast / rice ferment filtrate, hydroxypropyl tetrahydropyranotriol, and glycogen.

[0080] The mass percentages of each raw material in phases A through E are shown in Table 1 below.

[0081] (2) The preparation of face cream includes the following steps:

[0082] I) Mix and completely disperse the raw materials of phase A to obtain the first mixture;

[0083] II) Add the raw materials in phases B, C and E to the first mixture, heat to 60°C, and homogenize at 3000 r / min for 5 minutes to ensure complete dispersion, to obtain the second mixture;

[0084] III) Add the raw materials of phase D to the second mixture, heat to 60°C, and homogenize for 10 minutes at 3000 r / min to obtain the face cream.

[0085] Examples 2 to 5 and Comparative Examples 1 to 7 are largely the same as Example 1, except that the mass percentage of each ingredient in the face cream is different, as shown in Table 1 below.

[0086] Table 1. Percentage of each ingredient in the face cream by mass

[0087]

[0088] The efficacy of the face creams prepared in Examples 1 to 5 and Comparative Examples 1 to 7 was tested.

[0089] 1. Subjects:

[0090] The study included 120 female participants aged 20-55 years. Each group consisted of 10 participants, divided into 12 groups, who used the face creams prepared in Examples 1-5 and Comparative Examples 1-7, respectively.

[0091] All enrolled participants were healthy volunteers from Shanghai, with no history of skin diseases or other serious illnesses within the past three months, and who had not taken any antibiotics or hormonal medications. Written informed consent forms were provided to all participants before the study began, and they signed them after thorough communication. This research protocol has been approved by the Fudun Ethics Committee, and the entire research process was subject to strict supervision and guidance from the committee. The personal privacy and data security of the participants were strictly guaranteed.

[0092] Environmental conditions: The experimental environment was set according to the experimental requirements (temperature 20℃~22℃, humidity 40%~60%), and the subjects adapted to the experimental environment for 15 to 30 minutes or more.

[0093] 2. Test instruments:

[0094] (1) Vc20 (Courage & Khazaka GmbH, Visioscan® vc20plus, Cologne, Germany)

[0095] The Vc20 testing principle: A special CCD skin imaging system with an ultraviolet light source within the probe tests the skin surface, obtaining an image of the skin's active state. The black-and-white video signal reflecting the skin's active state is input into the testing system's digitizer for processing, and then into a computer. Analysis using dedicated active skin surface evaluation software SELS yields four numerical parameters evaluating the active skin surface condition, including the skin roughness SEsc value. This instrument can be used by dermatologists, cosmetic and pharmaceutical researchers to observe skin pathology and pigmentation, and to evaluate the efficacy of cosmetics and pharmaceuticals.

[0096] (2) Cutometer (Courage & Khazaka GmbH, Cologne, Germany)

[0097] Cutometer test principle: Based on the suction method, the skin's shape is mechanically changed by using negative pressure to measure the elasticity of the epithelial layer. The R2, R5, R7, F4 values ​​and collagen density values ​​can be obtained. A significant increase in the R2, R5, R7 values ​​and collagen density values ​​or a significant decrease in the F4 value before and after product use indicates that the product has the effect of tightening the skin.

[0098] 3. Test methods:

[0099] A series of tests were conducted on volunteers using various instruments. First, the subjects who passed the selection / exclusion screening form arrived at the testing center to sign the informed consent form, wash their face, straighten their hair, and sit quietly for 30 minutes. After the sitting time, VC20 images were taken. After the images were taken, the elasticity and texture of the skin around both eyes were tested. The data collection time points were before application (W0), after 2 weeks of consistent application (W2), after 4 weeks of consistent application (W4), and after 8 weeks of consistent application (W8).

[0100] 4. Data Analysis:

[0101] This experiment calculates the average value of the data obtained from each experiment, and compares the average value of the data measured before applying different examples or comparative proportions of the product to any test sample to obtain the mean change rate of the relevant parameters. If the change rate maintains a certain increase or decrease over a long period of time, it has a certain degree of universality.

[0102] 5. Test Results and Analysis

[0103] The Sesc, F4, R2, R5, R7, and collagen density values ​​mentioned below are the average values ​​of the Sesc, F4, R2, R5, R7, and collagen density values ​​of each of the 10 subjects in each group.

[0104] (1) Changes in the roughness of the skin around the eyes of the subjects:

[0105] Using the Vc20 instrument, skin images of each subject before and after applying the products of each embodiment and comparative example can be obtained. After digital processing, the skin roughness SEsc value can be obtained from the skin images.

[0106] SEsc value reduction rate (%) = (SEsc value before application - SEsc value after application) / SEsc value before application * 100%.

[0107] Table 2. Decrease rate of SEsc value of skin roughness around the eyes after 8 weeks of applying face cream.

[0108]

[0109] As shown in Table 2, after the subjects used the face creams of Examples 1 to 5 and Comparative Examples 1 to 7, the skin roughness of the subjects decreased to a certain extent. Compared with Comparative Examples 1 to 7, the decrease in skin roughness of Examples 1 to 5 was more obvious, indicating that Examples 1 to 5 had a better effect on improving skin roughness, especially Example 3, which had the most significant effect.

[0110] (2) Changes in the elasticity of the skin around the eyes of the subjects:

[0111] The Cutometer instrument was used to test the skin physiological parameters of each subject before and after using the face cream in each embodiment and comparative example, including F4 value, R2 value, R5 value, R7 value, and collagen density value.

[0112] 1) Analysis of F4 value changes over time:

[0113] The rate of decrease in F4 value is shown in Table 3 below.

[0114] F4 value reduction rate (%) = [F4 value before application - F4 value after application] / F4 value before application * 100%.

[0115] Table 3. Rate of decrease in F4 value of skin around the eyes after 8 weeks of applying face cream.

[0116]

[0117] 2) Analysis of R² value changes over time:

[0118] The rate of increase of R2 values ​​is shown in Table 4 below.

[0119] R2 value increase rate (%) = [R2 value after application - R2 value before application] / R2 value before application * 100%.

[0120] Table 4. Increase rate of R2 value in the skin around the eyes after 8 weeks of applying face cream.

[0121]

[0122] 3) Analysis of R5 value changes over time:

[0123] The rate of increase of R5 values ​​is shown in Table 5 below.

[0124] R5 value increase rate (%) = [R5 value after application - R5 value before application] / R5 value before application * 100%.

[0125] Table 5. Increase rate of R5 value in the skin around the eyes after 8 weeks of applying face cream.

[0126]

[0127] 4) Analysis of R7 value changes over time:

[0128] The rate of increase of R7 values ​​is shown in Table 6 below.

[0129] R7 value increase rate (%) = [R7 value after application - R7 value before application] / R7 value before application * 100%.

[0130] Table 6. Increase rate of R7 value in the skin around the eyes after 8 weeks of applying face cream.

[0131]

[0132] 5) Analysis of changes in collagen density over time:

[0133] The rate of increase in collagen density values ​​is shown in Table 7 below.

[0134] Collagen density increase rate (%) = [Collagen density value after application - Collagen density value before application] / Collagen density value before application * 100%.

[0135] Table 7. Increase rate of collagen density in the skin around the eyes after 8 weeks of applying face cream.

[0136]

[0137] As shown in Tables 3 to 7, after the subjects used the face creams of Examples 1 to 5 and Comparative Examples 1 to 7, the subjects' skin F4 values ​​all decreased to some extent, while the R2, R5, R7 values ​​and collagen density values ​​all increased to some extent. Compared with Comparative Examples 1 to 7, the decrease rate of skin F4 value and the increase rate of R2, R5, R7 values ​​and collagen density values ​​of Examples 1 to 5 were more obvious, indicating that Examples 1 to 5 have better effects on tightening the skin and restoring skin elasticity, especially Example 3, which has the most significant effect.

[0138] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0139] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A composition having skin-smoothing and firming functions, characterized in that, The components include: Yeast / rice fermentation product filtrate, hydroxypropyltetrahydropyranotriol, and glycogen; the mass ratio of the yeast / rice fermentation product filtrate, the hydroxypropyltetrahydropyranotriol, and the glycogen is (0.72~3):(5.2~10):(0.96~2). The glycogen was prepared by enzymatically hydrolyzing glutinous corn starch three times using isoamylase, short-chain amylopectin, branching enzyme AqBE, and maltose-to-glucosyltransferase TaqAM, followed by purification and spray drying of the resulting products. The glycogen is a high molecular weight polysaccharide composed of α-1,4-glycosidic bonds and α-1,6-glycosidic bonds, with a molecular weight of 10. 6 Da~10 9 Da.

2. The composition according to claim 1, characterized in that, The preparation of the yeast / rice fermentation product filtrate includes the following steps: After soaking and steaming the rice into cooked rice, water is added to the cooked rice and then cooled. A suspension containing yeast strains is inoculated into the rice, fermented, filtered, and the filtrate is collected.

3. A skincare product, characterized in that, The raw materials include the composition as described in any one of claims 1 to 2 and other raw materials, wherein the other raw materials are one or more of solvents, skin care agents, thickeners, chelating agents, skin feel modifiers, preservatives, solubilizers and fragrances.

4. The skincare product according to claim 3, characterized in that, The skincare products include face creams.

5. The skincare product according to claim 4, characterized in that, In the face cream, the mass of the yeast / rice fermentation product filtrate accounts for 0.01% to 3% of the total mass of the face cream raw materials, the mass of the hydroxypropyl tetrahydropyranotriol accounts for 0.1% to 10% of the total mass of the face cream raw materials, and the mass of the glycogen accounts for 0.01% to 2% of the total mass of the face cream raw materials.

6. The skincare product according to claim 3, characterized in that, The other raw materials meet one or more of the following conditions: (1) The solvent includes water; (2) The skin care agent includes one or more of phytosterols, squalane, tocopheryl acetate and behenol; (3) The thickener includes one or more of sodium acrylate / sodium acryloyl dimethyl taurate copolymer, xanthan gum, carboxymethyl cellulose, kaolin and titanium dioxide; (4) The chelating agent includes EDTA-2NA; (5) The skin feel modifier includes isononyl isononanoate; (6) The preservative includes one or more of phenoxyethanol and pentanediol; (7) The solubilizer includes PEG-100 stearate; (8) The fragrances include daily-use fragrances.

7. A method for preparing a skincare product as described in any one of claims 3 to 6, characterized in that, Includes the following steps: The ingredients in the skincare products are categorized into water-soluble ingredients, fat-soluble ingredients, and emulsifying ingredients. The water-soluble raw materials are mixed to prepare a first mixture; The fat-soluble raw material is added to the first mixture, and the mixture is heated and dispersed to prepare a second mixture. The emulsifying raw material is added to the second mixture, and the mixture is heated and emulsified to prepare the skin care product.

8. The method for preparing the skincare product according to claim 7, characterized in that, The temperatures of the first and second heating processes are each independently between 55°C and 65°C.

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