Skin care composition for improving skin elasticity and preparation method and application thereof

Abstract

The invention belongs to the technical field of skin care products, and particularly relates to a skin care composition for improving skin elasticity and a preparation method and application thereof. The skin care composition is prepared from the following raw materials in percentage by mass: 0.1 to 0.5 percent of ganoderma sinensis extract, 10 to 20 percent of rice fermentation product filtrate, 1 to 5 percent of ginseng root extract, 1 to 5 percent of peony extract, 0.1 to 1 percent of saussurea involucrata extract, 0.1 to 0.2 percent of pentaerythritol tetra (bis-tert-butyl hydroxy hydrocinnamate) ester, 10 to 20 percent of hydrogenated polyisobutene and the balance of caprylic / caprin. In the preparation process of the rice fermentation product filtrate, the oligomeric schizophyllan and adenosine components are added, and the synergistic effect of the oligomeric schizophyllan and adenosine can effectively improve the content of total flavonoids and total polyphenols in the rice fermentation product filtrate. Furthermore, the content of total flavonoids and total polyphenols in the rice fermentation product filtrate is increased, so that the improvement effect of the skin care product on the skin elasticity can be effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of skin care technology, specifically relating to a skin care composition for improving skin elasticity, its preparation method, and its application. Background Technology

[0002] Skin elasticity is the skin's ability to stretch and return to its original shape, a property crucial for maintaining healthy and youthful skin. Internal factors affecting skin elasticity primarily include: firstly, with age, the synthesis of collagen and elastin decreases while their breakdown increases, leading to decreased skin elasticity; secondly, dehydration also contributes to reduced skin elasticity. External factors affecting skin elasticity mainly include: firstly, environmental factors, such as prolonged sun exposure and air pollution, which accelerate skin aging and cause loss of elasticity; secondly, unhealthy lifestyle habits, such as smoking, malnutrition, and lack of exercise, also negatively impact skin elasticity. In response to the problem of decreased skin elasticity, various skincare products have emerged on the market, hoping to improve skin elasticity through their use.

[0003] Rice (scientific name *Oryza sativa*) is a popular choice for skincare product ingredients due to its rich nutritional components and bioactive substances. For example, Chinese patent CN113440465A describes rice anthocyanins as flavonoid compounds with effects such as enhancing immunity, anti-oxidation, and delaying aging. Common extraction processes for rice active ingredients include enzymatic extraction, alkaline extraction, and ultrasonic extraction. However, current rice fermentation processes have significant limitations in extracting and applying these active ingredients. While alkaline extraction can yield a large amount of active ingredients, the accompanying chemical changes limit its application. Chinese patent CN105193658A discloses the use of *Bifidobacterium* to ferment rice for use in skincare products to achieve anti-aging effects. Chinese patent CN107496296A discloses the use of sake yeast to ferment rice. Although these fermentation methods are relatively mild, the content of key active ingredients such as total flavonoids and total phenols in the resulting fermentation products is still relatively low, resulting in a limited content of effective ingredients in the final product, which is insufficient to meet market demand. Therefore, it is necessary to improve the fermentation process of rice to increase the content of its active ingredients, thereby promoting its application in the field of skin care technology.

[0004] Schizophyllum oligosaccharides are functional polysaccharides produced by the fermentation of Schizophyllum commune. Through specific processing, their molecular weight is reduced to form oligosaccharides. As a microbial metabolite, schizophyllum oligosaccharides can serve as a carbon and energy source during fermentation, promoting nutrient transfer and enhancing microbial activity and fermentation stability. Adenosine is an important energy source in organisms; it can generate ATP (adenosine triphosphate) through phosphorylation, providing energy for cells. During fermentation, adenosine can serve as an energy source for microorganisms, supporting their growth and metabolic activities, and can also participate in cell signaling, indirectly affecting the fermentation process and product formation. However, there are few reports in existing technologies on adding schizophyllum oligosaccharides and adenosine to rice fermentation processes to increase the content of active ingredients in fermentation products.

[0005] Based on the above background, the present invention provides a skin care composition for improving skin elasticity, its preparation method and application. Summary of the Invention

[0006] The first objective of this invention is to provide a skin care composition that improves skin elasticity, which can effectively improve skin elasticity.

[0007] The second objective of this invention is to provide a method for preparing a skin care composition that improves skin elasticity, which is simple and easy to operate.

[0008] The third objective of this invention is to provide an application of a skincare composition that improves skin elasticity, which has broad application prospects in the skincare industry.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A skincare composition for improving skin elasticity comprises the following raw materials in weight percentages: 0.1-0.5% Ganoderma lucidum extract, 10-20% rice fermentation product filtrate, 1-5% ginseng root extract, 1-5% peony extract, 0.1-1% snow lotus extract, 0.1-0.2% pentaerythritol tetra(bis-tert-butylhydroxyhydrogenated cinnamic acid) ester, 10-20% hydrogenated polyisobutylene, and the balance being caprylic / capric glyceride; The preparation process of the rice fermentation product filtrate is as follows: (1) The rice powder is subjected to steam explosion pretreatment to obtain pretreated rice powder; (2) Add the rice powder pretreated in step (1) to water, then add oligosaccharide and adenosine, and sterilize to obtain a mixture; (3) Add Lactobacillus plantarum to the mixture in step (2) for fermentation. After sterilization and centrifugation, obtain the supernatant. After filtering the supernatant, obtain the rice fermentation product filtrate.

[0010] Further, in step (2), the ratio of rice powder to water is 1:(6-12)mL, and the mass ratio of rice powder, oligosaccharide, and adenosine is 1:(2-5):(1.5-3).

[0011] Furthermore, the molecular weight of the oligosaccharide is less than 10 kDa.

[0012] Furthermore, the viable count of *Lactobacillus plantarum* in the mixture during step (3) is 1 × 10⁻⁶. 12 -5×10 15 CFU / g, wherein the amount of *Lactobacillus plantarum* added is 1-5% of the mass of rice powder.

[0013] Furthermore, the fermentation temperature in step (3) is 30-35℃, the time is 18-24h, and the rotation speed is 500-800rpm.

[0014] Further, the rice powder in step (1) has a mesh size of 20-30, the steam explosion pressure is 1-1.5 MPa, and the pressure is maintained for 60-75 s during the steam explosion.

[0015] The method for preparing the above-mentioned skincare composition for improving skin elasticity includes the following steps: a. Weigh each raw material according to the mass percentage ratio, and stir pentaerythritol tetra(bis-tert-butylhydroxyhydrocinnamic acid) ester and caprylic / capric glyceride at 70-80℃ to obtain mixture A; b. Cool mixture A to 30-35℃, add Ganoderma lucidum extract, ginseng root extract, peony extract, snow lotus extract, and rice fermentation product filtrate, mix well, then add hydrogenated polyisobutylene and mix well to obtain the final product.

[0016] The above-mentioned skincare composition for improving skin elasticity is used in the preparation of skincare products.

[0017] Furthermore, based on the total mass of the skincare product, the skincare composition for improving skin elasticity comprises 1-5% by mass.

[0018] Furthermore, the skincare product also includes the following ingredients in weight percentages: 2-3% butylene glycol, 0.5-0.8% hexanediol, 0.05-0.1% p-hydroxyacetophenone, with the balance being water.

[0019] Compared with the prior art, the main advantages of the present invention are as follows: 1. This invention adds oligosaccharides and adenosine as auxiliary fermentation factors during rice fermentation. Oligosaccharides promote the growth and metabolism of fermenting microorganisms, while adenosine acts as an energy supplement, accelerating cell metabolism. The synergistic effect of these two components effectively increases the content of total flavonoids and total polyphenols in the rice fermentation product filtrate. Experimental results of this invention show that the total flavonoid content in the obtained rice fermentation product filtrate reaches over 0.062 g / kg, and the total polyphenol content reaches over 0.086 g / kg.

[0020] 2. The skin care composition of the present invention can effectively improve skin elasticity, and after use, the skin elasticity parameter R2 value of the cheek area increases significantly by more than 33.33%. Detailed Implementation

[0021] The technical solution of the present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the following embodiments are only for illustrating the present invention and should not be regarded as limiting the present invention. Specific conditions not specified in the embodiments are performed according to conventional conditions or conditions recommended by the manufacturer. Unless otherwise specified, the reagents or instruments used are all conventional products obtained through commercial channels.

[0022] Example Example 1 A skincare composition for improving skin elasticity, comprising the following ingredients in weight percentages: 0.3% Ganoderma lucidum extract, 13% rice fermentation product filtrate, 2% ginseng root extract, 4% peony extract, 0.5% snow lotus extract, 0.15% pentaerythritol tetra(bis-tert-butylhydroxyhydrogenated cinnamic acid) ester, 12% hydrogenated polyisobutylene, and the balance being caprylic / capric glyceride.

[0023] The preparation process of rice fermentation product filtrate is as follows: (1) Load 25-mesh rice powder into the sample tube of the steam explosion test bench, introduce saturated steam until the pressure reaches 1.2 MPa, maintain this pressure for 70 s, and then release the pressure instantly to obtain pretreated rice powder. (2) According to the ratio of rice powder to water of 1:10mL, and the mass ratio of rice powder, oligosaccharide and adenosine of 1:4:2, add the rice powder pretreated in step (1) to water, then add oligosaccharide (molecular weight of 8KD) and adenosine, sterilize to obtain a mixture; (3) Add *Lactobacillus plantarum* to the mixture from step (2), wherein the viable count of *Lactobacillus plantarum* in the mixture is 3 × 10⁻⁶. 13 The amount of *Lactobacillus plantarum* added was 2% of the mass of the rice powder. The mixture was fermented at 32°C and 600 rpm for 20 hours. The fermentation broth was sterilized, centrifuged, and the supernatant was obtained. The supernatant was then filtered to obtain the rice fermentation product filtrate.

[0024] The preparation process of Ganoderma lucidum extract is as follows: After drying, Ganoderma lucidum is pulverized and passed through a 200-mesh sieve to obtain Ganoderma lucidum powder. 20 times its weight of 85% ethanol solution is added to the powder and soaked for 60 hours. After filtration, the solution is centrifuged at 2500 rpm / min for 15 minutes to obtain the supernatant. The supernatant is concentrated by rotary evaporation to a concentration of 1 g / ml. The concentrate is sterilized by passing it through a microporous membrane filter to obtain Ganoderma lucidum extract.

[0025] The preparation process of ginseng root extract is as follows: After drying the ginseng root, it is pulverized. Four times the volume of water is added to the ginseng root powder, and it is soaked at 55°C for 50 minutes. Then, it is heated and decocted for 2.5 hours. The decoction is filtered to obtain the filtrate. The filtrate is concentrated to the same volume as the ginseng root powder to obtain the ginseng root extract.

[0026] The preparation process of peony extract is as follows: The whole peony plant was dried and pulverized to obtain 100-mesh peony powder. A mixed enzyme solution consisting of cellulase and pectinase was added to the peony powder at a mass ratio of 1:5 for enzymatic hydrolysis. The mass concentrations of cellulase and pectinase in the mixed enzyme solution were 0.3 mg / mL and 0.3 mg / mL, respectively. Hydrolysis was carried out for 3 hours, followed by enzyme inactivation at 85℃. The inactivated hydrolysate was then subjected to ultrasonic extraction at a frequency of 80 kHz for 0.5 hours. This extraction was repeated three times. The extracts were then separated and combined to obtain the peony extract.

[0027] The preparation process of snow lotus extract is as follows: After drying, the snow lotus flower is pulverized and extracted by reflux at 100°C for 1 hour with 80% ethanol solution. The extraction is repeated twice, and the extracts are combined. Then, the extracts are concentrated by vacuum distillation to obtain the snow lotus flower extract.

[0028] The specific process for preparing the above-mentioned skincare composition that improves skin elasticity is as follows: a. Weigh each raw material according to the mass percentage ratio, add pentaerythritol tetra(bis-tert-butylhydroxyhydrogenated cinnamic acid) ester and caprylic / capric glyceride to the emulsifying pot, stir evenly at 75°C to obtain mixture A; b. Cool mixture A to 32°C, add Ganoderma lucidum extract, ginseng root extract, peony extract, snow lotus extract, and rice fermentation product filtrate, mix well, then add hydrogenated polyisobutylene and mix well to obtain the final product.

[0029] Example 2 A skincare composition for improving skin elasticity, comprising the following ingredients in weight percentages: 0.1% Ganoderma lucidum extract, 10% rice fermentation product filtrate, 5% ginseng root extract, 1% peony extract, 0.1% snow lotus extract, 0.1% pentaerythritol tetra(bis-tert-butylhydroxyhydrogenated cinnamic acid) ester, 10% hydrogenated polyisobutylene, and the balance being caprylic / capric glyceride.

[0030] The preparation process of rice fermentation product filtrate is as follows: (1) Load 20-mesh rice powder into the sample tube of the steam explosion test bench, introduce saturated steam until the pressure reaches 1MPa, maintain this pressure for 75s, and then release the pressure instantly to obtain pretreated rice powder. (2) According to the ratio of rice powder to water of 1:12mL, and the mass ratio of rice powder, oligosaccharide and adenosine of 1:2:1.5, add the rice powder pretreated in step (1) to water, then add oligosaccharide (molecular weight of 5KD) and adenosine, sterilize and obtain a mixture. (3) Add *Lactobacillus plantarum* to the mixture from step (2), wherein the viable count of *Lactobacillus plantarum* in the mixture is 5 × 10⁻⁶. 15 The amount of *Lactobacillus plantarum* added was 1% of the mass of the rice powder. The mixture was fermented at 35°C and 500 rpm for 18 hours. The fermentation broth was sterilized, centrifuged, and the supernatant was obtained. The supernatant was then filtered to obtain the rice fermentation product filtrate.

[0031] The preparation process of Ganoderma lucidum extract is the same as in Example 1.

[0032] The preparation process of ginseng root extract is the same as in Example 1.

[0033] The preparation process of the peony extract is the same as in Example 1.

[0034] The preparation process of the snow lotus extract is the same as in Example 1.

[0035] The specific process for preparing the above-mentioned skincare composition that improves skin elasticity is as follows: a. Weigh each raw material according to the mass percentage ratio, add pentaerythritol tetra(bis-tert-butylhydroxyhydrogenated cinnamic acid) ester and caprylic / capric glyceride to the emulsifying pot, stir evenly at 80°C to obtain mixture A; b. Cool mixture A to 35°C, add Ganoderma lucidum extract, ginseng root extract, peony extract, snow lotus extract, and rice fermentation product filtrate, mix well, then add hydrogenated polyisobutylene and mix well to obtain the final product.

[0036] Example 3 A skincare composition for improving skin elasticity, comprising the following ingredients in weight percentages: 0.5% Ganoderma lucidum extract, 20% rice fermentation product filtrate, 5% ginseng root extract, 5% peony extract, 1% snow lotus extract, 0.2% pentaerythritol tetra(bis-tert-butylhydroxyhydrogenated cinnamic acid) ester, 20% hydrogenated polyisobutylene, and the balance being caprylic / capric glyceride.

[0037] The preparation process of rice fermentation product filtrate is as follows: (1) Load 30-mesh rice powder into the sample tube of the steam explosion test bench, introduce saturated steam until the pressure reaches 1.5MPa, maintain this pressure for 60s, and then release the pressure instantly to obtain pretreated rice powder. (2) According to the ratio of rice powder to water of 1:6mL, and the mass ratio of rice powder, oligosaccharide and adenosine of 1:5:3, add the rice powder pretreated in step (1) to water, then add oligosaccharide (molecular weight of 2KD) and adenosine, sterilize to obtain a mixture; (3) Add *Lactobacillus plantarum* to the mixture from step (2), wherein the viable count of *Lactobacillus plantarum* in the mixture is 1 × 10⁻⁶. 12 The amount of *Lactobacillus plantarum* added was 5% of the mass of rice powder. Fermentation was carried out at 30°C and 800 rpm for 24 hours. The fermentation broth was sterilized, centrifuged, and the supernatant was obtained. After filtering the supernatant, the rice fermentation product filtrate was obtained.

[0038] The preparation process of Ganoderma lucidum extract is the same as in Example 1.

[0039] The preparation process of ginseng root extract is the same as in Example 1.

[0040] The preparation process of the peony extract is the same as in Example 1.

[0041] The preparation process of the snow lotus extract is the same as in Example 1.

[0042] The specific process for preparing the above-mentioned skincare composition that improves skin elasticity is as follows: a. Weigh each raw material according to the mass percentage ratio, add pentaerythritol tetra(bis-tert-butylhydroxyhydrogenated cinnamic acid) ester and caprylic / capric glyceride to the emulsifying pot, stir evenly at 70°C to obtain mixture A; b. Cool mixture A to 30°C, add Ganoderma lucidum extract, ginseng root extract, peony extract, snow lotus extract, and rice fermentation product filtrate, mix well, then add hydrogenated polyisobutylene and mix well to obtain the final product.

[0043] Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 1 is as follows: In the preparation of rice fermentation product filtrate, a small molecule schizopolysaccharide with a molecular weight of 30KD was used instead of oligoschizopolysaccharide, and the rest remained the same as in Example 1.

[0044] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is as follows: In the preparation of rice fermentation product filtrate, glucose was used instead of oligosaccharide, and the rest remained the same as in Example 1.

[0045] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is as follows: No oligosaccharides were added during the preparation of the rice fermentation product filtrate; otherwise, the process remained the same as in Example 1.

[0046] Comparative Example 4 The difference between Comparative Example 4 and Example 1 is as follows: In the preparation of rice fermentation product filtrate, no oligosaccharides were added, and the mass ratio of rice powder to adenosine was 1:6, with the rest remaining consistent with Example 1.

[0047] Comparative Example 5 The difference between Comparative Example 5 and Example 1 is as follows: No adenosine was added during the preparation of the rice fermentation product filtrate; otherwise, it remained the same as in Example 1.

[0048] Comparative Example 6 The difference between Comparative Example 6 and Example 1 is as follows: No adenosine was added during the preparation of the rice fermentation product filtrate, and the mass ratio of rice powder to oligosaccharide was 1:6, with the rest remaining the same as in Example 1.

[0049] Comparative Example 7 The difference between Comparative Example 7 and Example 1 is as follows: In the preparation of rice fermentation product filtrate, no oligosaccharides or adenosine were added, and the rest was consistent with Example 1.

[0050] Test case Experimental Example 1 The total flavonoids and their content in the rice fermentation product filtrates obtained in Examples 1-3 and Comparative Examples 1-7 were detected, and the procedure is as follows: Total flavonoid content: The test was conducted in accordance with the standard GB / T5009.124-2003, with rutin as the reference standard. The results are shown in Table 1. Total polyphenol content: The test was conducted in accordance with the standard GB / T8313-2008, and the results are shown in Table 1.

[0051] Table 1 As can be seen from Table 1, the rice fermentation product filtrate obtained by this invention has a high content of total flavonoids and total polyphenols, with the total flavonoid content reaching more than 0.062 g / kg and the total polyphenol content reaching more than 0.086 g / kg.

[0052] Compared with Examples 1-3, the contents of total flavonoids and total polyphenols in the rice fermentation product filtrate obtained in Comparative Examples 1-7 were reduced to varying degrees. Among them, the contents of total flavonoids and total polyphenols in the rice fermentation product filtrate obtained in Comparative Example 7 were the lowest, with a flavonoid content of only 0.037 g / kg and a total polyphenol content of only 0.055 g / kg.

[0053] In the preparation of rice fermentation product filtrate, Comparative Example 1 used a small molecule schizopolysaccharide with a molecular weight of 30KD instead of oligoschizopolysaccharide; Comparative Example 2 used glucose instead of oligoschizopolysaccharide; Comparative Example 3 did not add oligoschizopolysaccharide; Comparative Example 4 did not add oligoschizopolysaccharide, but increased the amount of adenosine; Comparative Example 5 did not add adenosine; Comparative Example 6 added adenosine, and increased the amount of oligoschizopolysaccharide; Comparative Example 7 did not add either oligoschizopolysaccharide or adenosine. Based on the results of the total flavonoid and total polyphenol content in the rice fermentation product filtrate, the synergistic effect of oligoschizopolysaccharide and adenosine can effectively increase the total flavonoid and total polyphenol content in the rice fermentation product filtrate.

[0054] The effects of adding the skin care compositions of Examples 1-3 and Comparative Examples 1-7 of the present invention will be explained below.

[0055] A skincare product comprising the following ingredients in percentages by weight: 2% butylene glycol, 0.6% hexanediol, 0.06% p-hydroxyacetophenone, and 3% of the above-mentioned skin care compositions.

[0056] Experimental Example 2 The safety of skincare products obtained by adding the skincare compositions of Examples 1-3 and Comparative Examples 1-7 was tested, and the specific process is as follows: Referring to the 2015 "Cosmetic Safety Technical Specifications", the skin care products prepared from the skin care compositions obtained in Examples 1-3 and Comparative Examples 1-7 were evaluated for irritation using a skin patch test. The test was conducted on individuals aged 18-55 years, with a total of 200 participants randomly divided into 10 groups. The evaluation criteria are shown in Table 2, and the experimental results are shown in Table 3.

[0057] Table 2 Table 3 As can be seen from Table 3, the skin care composition of the present invention is gentle and non-irritating to the skin and safe to use.

[0058] Experimental Example 3 The ability of skincare products containing the skincare compositions of Examples 1-3 and Comparative Examples 1-7 to improve skin elasticity was tested, and the procedure is as follows: Subjects: 100 female subjects aged 18-55 years were selected and randomly divided into 10 groups.

[0059] Experimental Procedure: Subjects used skincare products containing the skincare compositions of Examples 1-3 and Comparative Examples 1-7 twice daily, morning and evening. Follow-up was conducted before use and again after 28 days of use, at the same time each day. No other products of the same type were allowed during the experiment. Before testing, subjects sat quietly for 20 minutes in a constant temperature and humidity waiting area (22°C, 50% RH). The researchers used an MPA580 skin elasticity meter to measure the skin elasticity of the stratum corneum on the subjects' cheeks. The parameter R² was selected as a comparison index (R²: the ratio of skin rebound without negative pressure to the maximum stretch under negative pressure; the closer the ratio is to 1, the better the skin elasticity). The change in skin elasticity value R² before and after product use was used to evaluate the product's effect on improving skin elasticity in the test area. The final data is the average of all data from this group.

[0060] R2 parameter change rate = (R2 parameter value of skin after 28 days of skincare product use - R2 parameter value of skin before use) / R2 parameter value of skin before use × 100%, the results are shown in Table 4.

[0061] Table 4 The higher the rate of change of the R2 parameter, the greater the increase in elasticity.

[0062] As can be seen from Table 4, the skin care products with the skin care compositions obtained in Examples 1-3 have a higher rate of change. After use, the skin elasticity parameter R2 value of the cheek area increased significantly by more than 33.33%, indicating that the skin care composition of the present invention can effectively improve skin elasticity.

[0063] Compared to Examples 1-3, the change rate of skincare products obtained by adding the skincare compositions of Comparative Examples 1-7 was reduced. In all of Comparative Examples 1-7, the preparation process of the rice fermentation product filtrate was adjusted. Further analysis of the total flavonoid and total polyphenol content in the rice fermentation product filtrate showed that increasing the total flavonoid and total polyphenol content effectively improved the skincare product's effect on improving skin elasticity.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. The basic principles and main features of the present invention have been described above with specific implementation schemes. Based on the present invention, some modifications or substitutions can be made, but these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of protection claimed by the present invention.

Claims

1. A skincare composition for improving skin elasticity, characterized in that, It is composed of the following raw materials in the indicated weight percentages: Ganoderma lucidum extract 0.1-0.5%, rice fermentation product filtrate 10-20%, ginseng root extract 1-5%, peony extract 1-5%, snow lotus extract 0.1-1%, pentaerythritol tetra(bis-tert-butylhydroxyhydrogenated cinnamic acid) ester 0.1-0.2%, hydrogenated polyisobutylene 10-20%, and the balance being caprylic / capric glyceride; The preparation process of the rice fermentation product filtrate is as follows: (1) The rice powder is subjected to steam explosion pretreatment to obtain pretreated rice powder; (2) Add the rice powder pretreated in step (1) to water, then add oligosaccharide and adenosine, and sterilize to obtain a mixture; (3) Add Lactobacillus plantarum to the mixture in step (2) for fermentation. After sterilization and centrifugation, obtain the supernatant. After filtering the supernatant, obtain the rice fermentation product filtrate.

2. The skincare composition for improving skin elasticity according to claim 1, characterized in that, The ratio of rice powder to water in step (2) is 1:(6-12)mL, and the mass ratio of rice powder, oligosaccharide, and adenosine is 1:(2-5):(1.5-3).

3. The skincare composition for improving skin elasticity according to claim 2, characterized in that, The molecular weight of the oligosaccharide is less than 10 kDa.

4. The skincare composition for improving skin elasticity according to claim 1, characterized in that, The viable count of *Lactobacillus plantarum* in the mixture in step (3) is 1 × 10⁻⁶. 12 -5×10 15 CFU / g, wherein the amount of *Lactobacillus plantarum* added is 1-5% of the mass of rice powder.

5. The skincare composition for improving skin elasticity according to claim 1, characterized in that, The fermentation temperature in step (3) is 30-35℃, the time is 18-24h, and the rotation speed is 500-800rpm.

6. The skincare composition for improving skin elasticity according to claim 1, characterized in that, The rice powder in step (1) has a mesh size of 20-30, the steam explosion pressure is 1-1.5 MPa, and the pressure is maintained for 60-75 seconds during the steam explosion.

7. The method for preparing the skincare composition for improving skin elasticity according to claim 1, characterized in that, Includes the following steps: a. Weigh each raw material according to the mass percentage ratio, and stir pentaerythritol tetra(bis-tert-butylhydroxyhydrocinnamic acid) ester and caprylic / capric glyceride at 70-80℃ to obtain mixture A; b. Cool mixture A to 30-35℃, add Ganoderma lucidum extract, ginseng root extract, peony extract, snow lotus extract, and rice fermentation product filtrate, mix well, then add hydrogenated polyisobutylene and mix well to obtain the final product.

8. The application of the skin care composition for improving skin elasticity according to claim 1, characterized in that, Applications in the preparation of skin care products.

9. The application of the skin care composition for improving skin elasticity according to claim 8, characterized in that, The skin elasticity-improving skincare composition comprises 1-5% by weight of the total weight of the skincare products.

10. The application of the skin care composition for improving skin elasticity according to claim 8, characterized in that, The skincare product also includes the following ingredients in weight percentage: 2-3% butylene glycol, 0.5-0.8% hexanediol, 0.05-0.1% p-hydroxyacetophenone, with the balance being water.

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