A kind of mite-removing, itching-relieving, acne-removing and whitening shower gel and preparation method thereof

Abstract

The present invention relates to the technical field of cosmetics, and in particular to a mite-removing, itching-relieving, acne-removing, and whitening shower gel and a preparation method thereof. The shower gel of the present invention contains dipotassium glycyrrhizinate and arbutin with whitening and other functions, and is also added with sulfur with sterilization and mite-killing functions; at the same time, plant extracts such as Platycladus orientalis leaf extract, Polygonum multiflorum extract, Artemisia annua extract, Leontopodium alpinum extract, Centella asiatica extract, Pteris villosa extract, and Duckweed extract are added to give the shower gel better mite-removing, itching-relieving, acne-removing, whitening, moisturizing, and antibacterial effects. A variety of surfactants are also added to the shower gel of the present invention to give the shower gel a better cleaning effect. Moisturizers, grape seed oil, avocado oil, and evening primrose oil are also added, so that the product has a better skin-moisturizing and skin-moisturizing effect.

Description

Technical Field

[0001] The invention relates to the technical field of cosmetics, and in particular to a mite-removing, itching-relieving, acne-removing and whitening shower gel and a preparation method thereof. Background Art

[0002] Shower gel is a personal care product that is mainly used to cleanse and moisturize the body. It contains cleansing ingredients and skin care ingredients, which can remove dirt and oil from the skin while providing moisturizing and nourishing effects, making the skin feel refreshed and smooth. There are many types of shower gels. According to different needs and preferences, you can choose a shower gel that suits your skin type and fragrance.

[0003] Shower gel usually contains cleaning ingredients (such as surfactants) and skin care ingredients (such as moisturizers, plant extracts, etc.), which can effectively clean the skin while providing moisturizing, nourishing, soothing, emollient and other effects.

[0004] With the development of society and people's pursuit of quality of life, more and more requirements are put forward for the functions and effects of shower gels; however, there are many types of shower gels with mite removal, itching relief, acne removal and whitening functions on the market; however, many of them cannot take into account the efficacy strength of various functions. Therefore, developing a shower gel with balanced functional effects of mite removal, itching relief, acne removal and whitening is a technical problem that needs to be solved urgently. Summary of the invention

[0005] In view of the above technical problems, the inventors proposed the technical solution of the present invention. The present invention relates to the field of cosmetic technology, and specifically to a mite-removing, itching-relieving, acne-removing, and whitening shower gel and a preparation method thereof.

[0006] The shower gel of the present invention contains dipotassium glycyrrhizinate and arbutin with whitening and other functions, and is further added with sulfur with sterilization and mite killing functions; at the same time, plant extracts such as Platycladus orientalis leaf extract, Polygonum multiflorum extract, Artemisia annua extract, Leontopodium alpinum extract, Centella asiatica extract, Pteris villosa extract and Duckweed extract are added, giving the shower gel good mite removal, itching relief, acne removal, whitening, moisturizing, antibacterial and other effects. A variety of surfactants are further added to the shower gel of the present invention, giving the shower gel a good cleaning effect. Moisturizers, grape seed oil, avocado oil and evening primrose oil are further added, so that the product has good skin moisturizing and moisturizing effects.

[0007] Furthermore, the mite-removing, itching-relieving, acne-removing and whitening shower gel of the present invention comprises, by mass percentage, 0.01-0.4% dipotassium glycyrrhizinate, 0.02-0.1% arbutin, 0.05-0.5% orientalis leaf extract, 0.02-0.4% polygonum multiflorum extract, 0.01-0.3% artemisia annua extract, 0.01-0.35% alpine edelweiss extract, 0.05-0.4% centella asiatica extract, 0.01-0.5% phoenix tail extract, 0.02-0. 55% duckweed extract, 0.01-0.6% sulfur, 2-4% AES, 1-5.5% ammonium lauryl sulfate, 2-4% alkyl glycoside, 5-10% amino acid surfactant, 5-10% moisturizer, 1-3% grape seed oil, 1.5-4% avocado oil, 2-4% evening primrose oil, 0.01-0.6% polyquaternium, 0.05-0.3% phenoxyethanol, 0.05-2% carbomer, 0.05-0.6% chelating agent, 0.1-0.6% pH adjuster and balance water.

[0008] Furthermore, the moisturizing agent is at least one of glycerin, propylene glycol, and β-glucan.

[0009] Furthermore, the moisturizing agent is glycerin, propylene glycol and β-glucan.

[0010] Furthermore, the preparation method of the Pteris villosa extract comprises the following steps:

[0011] (1) Crush the dried phoenix grass to obtain a powder, add water 10-30 times the mass of the powder, heat to 40-50° C., stir for 5-10 hours, and cool to obtain a mixture;

[0012] (2) adding ethanol in an amount of 10 to 30 times the mass of the powder to the mixture in step (1), stirring, filtering, and obtaining a filtrate;

[0013] (3) ultrafiltration the filtrate using an ultrafiltration membrane with a molecular weight cutoff lower than 2000Da, and drying the ultrafiltration filtrate to obtain the phoenix tail grass extract.

[0014] Furthermore, the preparation method of the duckweed extract comprises the following steps:

[0015] I. Crush the dried duckweed to obtain powder, add 20-35wt% ethanol aqueous solution with a concentration of 12-50 times the mass of the powder, heat to 35-45° C., stir for 6-20 hours, and cool to obtain a material;

[0016] II. Filter the material in step I to obtain a filtrate, and then ultrafilter it using an ultrafiltration membrane with a molecular weight cutoff lower than 2500Da. Dry the ultrafiltered filtrate to obtain the duckweed extract.

[0017] Furthermore, the preparation method of the alpine edelweiss extract comprises the following steps:

[0018] S1: Crush the dried alpine edelweiss, add 10-30 times the mass of water, and boil at 80-90℃ for 4-8 hours;

[0019] S2: The decoction material is cooled, filtered, and then ultrafiltered using an ultrafiltration membrane with a molecular weight cutoff lower than 3000 Da. The ultrafiltration filtrate is dried to obtain the duckweed extract.

[0020] Furthermore, the mass ratio of the alpine edelweiss extract to the Centella asiatica extract is 1:1-2.

[0021] Furthermore, the amino acid surfactant includes at least one of N-fatty acyl sarcosinate, N-lauroyl aspartate, and N-lauroyl glutamate.

[0022] Furthermore, the raw materials such as the Platycladus orientalis leaf extract, Polygonum multiflorum extract, Artemisia annua extract, Centella asiatica extract, etc. can be obtained by water or solvent extraction, or can be obtained by commercially available methods.

[0023] Furthermore, the present invention also provides a method for preparing the mite-removing, itching-relieving, acne-removing and whitening shower gel, which is characterized by comprising the following steps:

[0024] Step 1: Add water to a reaction container, heat it, add carbomer, sulfur, AES, ammonium lauryl sulfate, alkyl glycoside, and amino acid type surfactant, stir, and obtain an aqueous phase;

[0025] Step 2: Add moisturizer, grape seed oil, avocado oil and evening primrose oil into a reaction kettle, heat and stir to obtain an oil phase;

[0026] Step 3: Add the oil phase to the water phase and stir; cool down, then add dipotassium glycyrrhizinate, arbutin, Platycladus orientalis leaf extract, Polygonum multiflorum extract, Artemisia annua extract, Leontopodium alpinum extract, Centella asiatica extract, Pteris villosa extract, Duckweed extract, polyquaternium salt, phenoxyethanol, chelating agent and pH adjuster, continue stirring, sterilize, and obtain the mite removing, itching relieving, acne removing and whitening shower gel.

[0027] Furthermore, the heating temperature in step 1 is 40-60°C, and the heating temperature in step 2 is 70-82°C.

[0028] Furthermore, the stirring speed of steps 1-3 is between 50-1000 rpm.

[0029] Furthermore, in step 3, the temperature is lowered to 10-30°C.

[0030] Beneficial effects of the present invention:

[0031] The shower gel of the present invention contains dipotassium glycyrrhizinate and arbutin with whitening and other functions, and is further added with sulfur with sterilization and mite killing functions; at the same time, plant extracts such as Platycladus orientalis leaf extract, Polygonum multiflorum extract, Artemisia annua extract, Leontopodium alpinum extract, Centella asiatica extract, Pteris villosa extract and Duckweed extract are added, giving the shower gel good mite removal, itching relief, acne removal, whitening, moisturizing, antibacterial and other effects. A variety of surfactants are further added to the shower gel of the present invention, giving the shower gel a good cleaning effect. Moisturizers, grape seed oil, avocado oil and evening primrose oil are further added, so that the product has good skin moisturizing and moisturizing effects.

[0032] The invention uses different extraction methods to prepare alpine edelweiss extract, pteris viridis extract and duckweed extract, and then uses the raw materials to prepare shower gel with excellent efficacy.

[0033] The shower gel prepared by the present invention has a good effect of inhibiting Propionibacterium acnes. The shower gel of the present invention can effectively inhibit the generation of acne, so that it has a good acne-removing effect.

[0034] The present invention uses alpine edelweiss extract, Centella asiatica extract and sulfur, which can effectively improve the anti-acne effect of the shower gel. The present invention creatively selects the combination of the alpine edelweiss extract and the Centella asiatica extract specifically prepared by the present invention to produce a compound effect, which can further significantly increase the effect of the shower gel in inhibiting acne bacilli. In particular, when the ratio of the two is 1:1-2, the obtained shower gel has a better anti-acne effect.

[0035] The shower gel prepared by the present invention has a good antipruritic effect, wherein the pteris viridis extract, duckweed extract and sulfur used have a good effect on promoting and inhibiting skin itching, especially the combination of the pteris viridis extract and the duckweed extract has a mutually reinforcing relationship in increasing the antipruritic effect on the skin.

[0036] The preparation method of the shower gel of the present invention is simple, the product effect is excellent, and the shower gel has good application prospects. DETAILED DESCRIPTION

[0037] The present invention will be described below in conjunction with specific embodiments, and various effects of the present invention will be more clearly presented. It should be understood by those skilled in the art that these specific embodiments are used to illustrate the present invention, rather than to limit the present invention.

[0038] The raw materials used in the specific embodiments of the present invention are as follows.

[0039] The preparation method of the pteris villosa extract comprises the following steps:

[0040] (1) Crush the dried phoenix grass to obtain a powder, add water 20 times the mass of the powder, heat to 43° C., stir for 6 hours, and cool to obtain a mixture;

[0041] (2) Add ethanol in an amount 20 times the mass of the powder to the mixture in step (1), stir, and filter with a 2-micron filter membrane to obtain a filtrate;

[0042] (3) The filtrate was ultrafiltered using an ultrafiltration membrane with a molecular weight cutoff of 1800 Da, and the ultrafiltration filtrate was freeze-dried to a water content of 4.3% to obtain the pteris viridis extract.

[0043] The preparation method of the duckweed extract comprises the following steps:

[0044] I. Crush the dried duckweed to obtain a powder, add a 27.5wt% ethanol aqueous solution with a concentration of 32 times the mass of the powder, heat to 40° C., stir for 15 hours, and cool to room temperature to obtain a material;

[0045] II. The material of step (1) is filtered through a 2-micron filter membrane to obtain a filtrate, which is then ultrafiltered using an ultrafiltration membrane with a molecular weight cutoff of 2000 Da. The ultrafiltered filtrate is freeze-dried to a water content of 5.1% to obtain the duckweed extract.

[0046] The preparation method of the alpine edelweiss extract comprises the following steps:

[0047] S1: Crush the dried alpine edelweiss, add 25 times the mass of water, and boil at 85℃ for 5 hours;

[0048] S2: The decoction material is cooled, filtered with a 2-micron filter membrane, and then ultrafiltered with an ultrafiltration membrane with a molecular weight cutoff lower than 2500 Da. The ultrafiltration filtrate is freeze-dried to a water content of 5.4% to obtain the duckweed extract.

[0049] Platycladus orientalis leaf extract: Xi'an Pris Biotechnology Co., Ltd. Polygonum multiflorum extract: Xi'an Ruierli Biotechnology Co., Ltd. Artemisia annua extract: Shaanxi Bolin Biotechnology Co., Ltd. Centella asiatica extract: Xi'an Huilin Biotechnology Co., Ltd. Sulfur: Nano-sulfur powder MS-P100, Shanghai Huzheng Industrial Co., Ltd.

[0050] Preparation of shower gel

[0051] Body Wash 1:

[0052] Step 1: Prepare the raw materials according to the following mass percentages: 0.08% dipotassium glycyrrhizinate, 0.08% arbutin, 0.2% orientalis leaf extract, 0.25% polygonum multiflorum extract, 0.1% artemisia annua extract, 0.15% leontopodium alpinum extract, 0.27% centella asiatica extract, 0.25% phoenix tail grass extract, 0.32% duckweed extract, 0.3% sulfur, 3% AES, 4.2% ammonium lauryl sulfate, 3.2% alkyl glycoside APG0810, 6 .2% sodium N-lauroyl aspartate, 3% sodium N-lauroyl glutamate, 4% glycerin, 3.5% propylene glycol, 1.3% β-glucan, 2.5% grape seed oil, 3% avocado oil, 2.6% evening primrose oil, 0.4% polyquaternium-7, 0.2% phenoxyethanol, 1.2% carbomer-941, 0.4% chelating agent EDTA-2Na, 0.5% pH adjuster citric acid and the remainder water; the mass ratio of alpine edelweiss extract and Centella asiatica extract is 1:1.8.

[0053] Then, water was added to the reaction container, heated to 50° C., carbomer, sulfur, AES, ammonium lauryl sulfate, alkyl glycoside, and amino acid surfactant (sodium N-lauroyl aspartate, sodium N-lauroyl glutamate) were added, and stirred at 100 rpm for 0.4 hours to obtain an aqueous phase;

[0054] Step 2: Add moisturizers (glycerin, propylene glycol, β-glucan), grape seed oil, avocado oil, and evening primrose oil into a reaction kettle, heat to 75° C., and stir at 70 rpm for 0.5 hour to obtain an oil phase;

[0055] Step 3: Add the oil phase to the aqueous phase and stir at 75 rpm for 0.4 hours; cool to room temperature, then add dipotassium glycyrrhizinate, arbutin, Platycladus orientalis leaf extract, Polygonum multiflorum extract, Artemisia annua extract, Leontopodium alpinum extract, Centella asiatica extract, Pteris villosa extract, Duckweed extract, polyquaternium salt, phenoxyethanol, chelating agent and pH adjuster, continue stirring at 75 rpm for 0.4 hours, sterilize, and obtain the shower gel.

[0056] Shower gel 2: The difference from shower gel 1 is that the raw materials are as follows: 0.1% dipotassium glycyrrhizinate, 0.06% arbutin, 0.15% orientalis leaf extract, 0.22% polygonum multiflorum extract, 0.09% artemisia annua extract, 0.21% alpine edelweiss extract, 0.21% centella asiatica extract, 0.2% phoenix tail grass extract, 0.37% duckweed extract, 0.3% sulfur, 2% AES, 5% ammonium lauryl sulfate, 3.4% alkyl glycoside APG0810, 5% sodium N-lauroyl aspartate, 4% sodium N-lauroyl glutamate, 3.5% glycerin, 4% propylene glycol, 1.2% β-glucan, 2% grape seed oil, 3.2% avocado oil, 3% evening primrose oil, 0.4% polyquaternium-7, 0.25% phenoxyethanol, 1.18% carbomer-941, 0.42% chelating agent EDTA-2Na, 0.55% pH adjuster citric acid and the balance water; the mass ratio of alpine edelweiss extract and Centella asiatica extract is 1:1. Others are the same as shower gel 1.

[0057] Shower Gel 3: The difference from Shower Gel 1 is that it does not contain alpine edelweiss extract, centella asiatica extract and sulfur, and the amount of the three is supplemented by water. The rest is the same as Shower Gel 1.

[0058] Shower Gel 4: The difference from Shower Gel 1 is that it does not contain alpine edelweiss extract and Centella asiatica extract, and the amount of both is supplemented with water. Other ingredients are the same as Shower Gel 1.

[0059] Shower Gel 5: The difference from Shower Gel 1 is that it does not contain alpine edelweiss extract, and the amount of Centella asiatica extract is 0.42%. Other aspects are the same as Shower Gel 1.

[0060] Shower Gel 6: The difference from Shower Gel 1 is that it does not contain Centella asiatica extract, and the amount of alpine edelweiss extract is 0.42%. Other aspects are the same as Shower Gel 1.

[0061] Shower Gel 7: The difference from Shower Gel 1 is that it contains 0.28% of alpine edelweiss extract and 0.14% of Centella asiatica extract, and the mass ratio of alpine edelweiss extract to Centella asiatica extract is 1:0.5. The rest is the same as Shower Gel 1.

[0062] Shower Gel 8: The difference from Shower Gel 1 is that it contains 0.084% of alpine edelweiss extract and 0.336% of Centella asiatica extract, and the mass ratio of alpine edelweiss extract to Centella asiatica extract is 1:4. The rest is the same as Shower Gel 1.

[0063] Shower Gel 9: The difference from Shower Gel 1 is that it does not contain pteris extract, duckweed extract and sulfur, and the amount of the three is supplemented with water. The rest is the same as Shower Gel 1

[0064] Shower Gel 10: The difference from Shower Gel 1 is that it does not contain Pteris fasciata extract and Duckweed extract, and the amount of both is made up with water. The rest is the same as Shower Gel 1.

[0065] Shower Gel 11: The difference from Shower Gel 1 is that it does not contain Pteris fasciata extract, and the amount of Duckweed extract is 0.57%. Other aspects are the same as Shower Gel 1.

[0066] Shower Gel 12: The difference from Shower Gel 1 is that it does not contain Duckweed Extract and the extract of Pteris crenata is 0.57%. Other contents are the same as Shower Gel 1.

[0067] 2. Effect Verification

[0068] 1. Acne removal effect test

[0069] Propionibacterium acnes is the main factor causing pimples and acne on the skin. The acne-removing effect of the shower gel was evaluated by testing its inhibitory effect on Propionibacterium acnes.

[0070] The inhibitory effect on Propionibacterium acnes was tested according to the method described in WS / T 650-2019. Filter paper with a diameter of 5 mm and a thickness of 2.5 mm was soaked in the sample solution (the shower gel prepared above was diluted with deionized water to a concentration of 10 wt%), and after absorption saturation, it was taken out to obtain an antibacterial sample sheet.

[0071] Use a sterile cotton swab to dip the sample into a solution with a concentration of about 6.78×10 5 CFU / mL of acne bacteria suspension was evenly applied on the surface of the culture medium plate for 3 times, the plate was covered, and placed at room temperature for 5 minutes. Use sterile tweezers to take the antibacterial sample and stick it on the surface of the plate, and gently press the antibacterial sample to make it close to the surface of the plate. Then cover the plate and culture it in an environment of 37℃±0.5℃ for 15 hours, observe the results, measure the size of the antibacterial ring with a vernier caliper and record the data, test each group in parallel 5 times, and take the average value. The test results of the size of the antibacterial ring are shown in Table 1.

[0072] Table 1: Size of inhibition zone after dilution to 10 wt%

[0073] No. / Dilution to 10wt% Inhibition zone size / mm Shower Gel1 20.75 Shower Gel 2 20.21 Shower Gel 3 7.92 Shower Gel 4 12.46 Shower Gel 5 17.02 Shower Gel 6 17.94 Shower Gel7 19.24 Shower Gel8 18.65

[0074] The shower gel prepared above was diluted with deionized water to a concentration of 20 wt %, and tested according to the above method. The test results of the size of the inhibition zone are shown in Table 2.

[0075] Table 2: Size of inhibition zone after dilution to 20wt%

[0076]

[0077]

[0078] It can be seen from the test results of Tables 1 and 2 that the shower gel prepared by the present invention has a good effect of inhibiting Propionibacterium acnes, and the shower gel of the present invention can effectively inhibit the effect of acne generation, so that it has a good acne removal effect. It can be seen from the tests of shower gels 1, 3, and 4 that the present invention uses alpine edelweiss extract, Centella asiatica extract, and sulfur to effectively improve the acne removal effect of the shower gel. It can be seen from the tests of shower gels 1, 5, and 6 that the present invention creatively selects the collocation of the alpine edelweiss extract and Centella asiatica extract specifically prepared by the present invention to produce a compound effect, which can further significantly increase the effect of the shower gel in inhibiting Propionibacterium acnes. In particular, when the ratio of the two is 1:1-2, the acne removal effect of the obtained shower gel is better, and the content can be obtained according to the test results of shower gels 1, 2, 7, and 8.

[0079] 2. Antipruritic effect test

[0080] 80 SPF guinea pigs weighing 280±200g were randomly divided into 8 groups (7 shower gel groups and a control group) according to their body weight, with 5 males and females in each group. The guinea pigs in each group were depilated in an area of ​​about 2×2.5cm near the buttocks. After 24 hours, the depilated area of ​​the guinea pigs in the shower gel group was smeared with a sample at a smearing amount of 3.5g / kg guinea pig (the shower gel was diluted to 10wt% with deionized water), and the guinea pigs in the control group were smeared with an equal amount of physiological saline in the same way; 5 minutes after smearing, they were washed and dried with deionized water; each group was smeared once in the above manner, and smeared continuously for a total of 5 days. 1.2h after the last smearing, the depilated area of ​​the guinea pig was scratched to the extent of redness without bleeding, and the scratched area was about 1.5cm square area. Then, about 0.05 mL of 0.01 wt% histamine aqueous solution was dripped onto the abraded area, and the guinea pig was observed to see whether it turned its head to lick the depilatory area on its hind legs. If this did not happen, 5 minutes after the last dripping of the histamine solution, the concentration of the histamine aqueous solution was increased (the concentration of the histamine aqueous solution was increased by a concentration gradient of +0.01% each time) and 0.05 mL was continued to be dripped, and the guinea pig was observed to see whether it turned its head to lick the depilatory area on its hind legs. The experiment was terminated when the guinea pig turned its head to lick the depilatory area on its hind legs. The total amount of histamine (μg) used by a single guinea pig that turned its head to lick the depilatory area on its hind legs was recorded as the itch threshold. The specific results are shown in Table 3.

[0081] Table 3: Antipruritic effect test

[0082] Serial number Itch threshold / μg Shower Gel1 315.7 Shower Gel 2 309.8 Shower Gel 3 237.4 Shower Gel9 184.5 Shower Gel 10 242.6 Shower Gel11 298.3 Shower Gel12 306.2 Blank control group 38.5

[0083] The test results in Table 3 show that the shower gel prepared by the present invention has a good antipruritic effect, wherein the pteris viridis extract, duckweed extract and sulfur used have a good effect in promoting the inhibition of skin itching, especially the combination of the pteris viridis extract and duckweed extract has a mutually reinforcing relationship in increasing the antipruritic effect on the skin.

[0084] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A mite-removing, itching-relieving, acne-removing and whitening shower gel, characterized in that: The raw material composition is as follows, by mass percentage: 0.01-0.4% dipotassium glycyrrhizinate, 0.02-0.1% arbutin, 0.05-0.5% orientalis leaf extract, 0.02-0.4% Polygonum multiflorum extract, 0.01-0.3% Artemisia annua extract, 0.01-0.35% Leontopodium alpinum extract, 0.05-0.4% Centella asiatica extract, 0.01-0.5% Pteris viridis extract, 0.02-0.55% Duckweed extract, 0.01-0.6% sulfur, 2-4% AE S, 1-5.5% ammonium lauryl sulfate, 2-4% alkyl glycoside, 5-10% amino acid surfactant, 5-10% moisturizer, 1-3% grape seed oil, 1.5-4% avocado oil, 2-4% evening primrose oil, 0.01-0.6% polyquaternium salt, 0.05-0.3% phenoxyethanol, 0.05-2% carbomer, 0.05-0.6% chelating agent, 0.1-0.6% pH regulator and the balance water; the mass ratio of the alpine edelweiss extract to the Centella asiatica extract is 1:1-2; The preparation method of the pteris viridis extract comprises the following steps: (1) Crush the dried phoenix grass to obtain a powder, add water 10-30 times the mass of the powder, heat to 40-50° C., stir for 5-10 hours, and cool to obtain a mixture; (2) adding ethanol in an amount of 10 to 30 times the mass of the powder to the mixture in step (1), stirring, filtering, and obtaining a filtrate; (3) ultrafiltration the filtrate using an ultrafiltration membrane with a molecular weight cutoff of less than 2000Da, and drying the ultrafiltration filtrate to obtain the phoenix tail grass extract; The preparation method of the duckweed extract comprises the following steps: I. Crush the dried duckweed to obtain powder, add 20-35wt% ethanol aqueous solution with a concentration of 12-50 times the mass of the powder, heat to 35-45° C., stir for 6-20 hours, and cool to obtain a material; II. Filtering the material of step I to obtain a filtrate, and then ultrafiltering using an ultrafiltration membrane with a molecular weight cutoff lower than 2500Da, and drying the ultrafiltered filtrate to obtain the duckweed extract; The preparation method of the alpine edelweiss extract comprises the following steps: S1: Crush the dried alpine edelweiss, add 10-30 times the mass of water, and boil at 80-90℃ for 4-8 hours; S2: The decoction material is cooled, filtered, and then ultrafiltered using an ultrafiltration membrane with a molecular weight cutoff lower than 3000 Da. The ultrafiltration filtrate is dried to obtain the duckweed extract.

2. The mite-removing, itching-relieving, acne-removing and whitening shower gel according to claim 1, characterized in that: The moisturizing agent is at least one of glycerin, propylene glycol and β-glucan.

3. The mite-removing, itching-relieving, acne-removing and whitening shower gel according to claim 2, characterized in that: The moisturizing agents are glycerin, propylene glycol and beta-glucan.

4. The mite-removing, itching-relieving, acne-removing and whitening shower gel according to claim 1, characterized in that: The amino acid surfactant includes at least one of N-fatty acyl sarcosinate, N-lauroyl aspartate, and N-lauroyl glutamate.

5. A method for preparing the mite-removing, itching-relieving, acne-removing and whitening shower gel according to any one of claims 1 to 4, characterized in that: The steps include: Step 1: Add water to a reaction container, heat it, add carbomer, sulfur, AES, ammonium lauryl sulfate, alkyl glycoside, and amino acid type surfactant, stir, and obtain an aqueous phase; Step 2: Add moisturizer, grape seed oil, avocado oil and evening primrose oil into a reaction kettle, heat and stir to obtain an oil phase; Step 3: Add the oil phase to the water phase and stir; cool down, then add dipotassium glycyrrhizinate, arbutin, Platycladus orientalis leaf extract, Polygonum multiflorum extract, Artemisia annua extract, Leontopodium alpinum extract, Centella asiatica extract, Pteris villosa extract, Duckweed extract, polyquaternium salt, phenoxyethanol, chelating agent and pH adjuster, continue stirring, sterilize, and obtain the mite removing, itching relieving, acne removing and whitening shower gel.

6. The preparation method according to claim 5, characterized in that: The heating temperature in step 1 is 40-60°C, and the heating temperature in step 2 is 70-82°C.

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