KR20200134960A - Cosmetic composition for comprising sweet potato extract - Google Patents

Abstract

The present invention relates to a cosmetic composition that basically comprises a sweet potato tuber root ethanol extract. In addition, the cosmetic composition is very effective in moisturizing the skin, whitening the skin, maintaining or improving skin elasticity, and preventing skin wrinkles by further including a sweet potato pure ethanol extract and a pure vegetable leaf ethanol extract that cause synergistic effects against the sweet potato tuber ethanol extract, and can be usefully used for anti-aging effect.

Description

Cosmetic composition for comprising sweet potato extract as an active ingredient

The present invention relates to a cosmetic composition comprising a sweet potato extract as an active ingredient, and more particularly, to a new cosmetic composition that significantly increases the effect of the cosmetic composition containing through the synergistic effect of the sweet potato net extract on the sweet potato tuber root extract. will be.

Sweet potato is a perennial plant in the convolvulaceae family of the dicotyledonous plant, the currency plant, and is also called the gamseo-tang. It is cultivated widely throughout Korea. It is about 3m long. The stem is rooted while extending along the ground. The leaves are alternate, and the leaf body is shallowly divided into a heart shape, and the juice comes out when the leaves and stems are cut. Roots are made at the base of the petiole at the bottom of the stem, and a part of it grows in the ground to become a tuber root. The shape varies from a cylindrical shape to a ball with pointed sides, and the color varies from white, yellow, light red, red, and light purple.

Several flowers hang in the shape of a light red morning glory on the peduncle from the leaf axil in July-August. The calyx is split into 5 pieces. The corolla is funnel-shaped and has 5 stamens and 1 pistil. Fruits are ball-shaped capsules, with 2 to 4 dark brown seeds growing. When frost falls in the fall, leaves and stems seed. At this time, the sweet potatoes are harvested and stored warm and then planted in the seedbed the following spring to sprout. Cut shoots and plant them in a field to take root. In subtropical and tropical regions, it does not wither throughout the year, so stems are cut and propagated at the right time. When growing, seeds are not used.

The origin of sweet potatoes is estimated to be from Mexico to northern South America, and the origin of sweet potatoes is not clearly identified. It is generally estimated that it was cultivated in Central and South America from about 2000 years ago. At the time of the discovery of the new continent, it was widely cultivated by indigenous peoples. It was brought to Spain by Christopher Columbus, then to the Philippines and Fujian Province of China, and gradually spread to other Asian countries. It is cultivated mainly in Asia and Africa, and production is small in the West. As a country, it is cultivated in China, Indonesia, Korea, and Brazil, and there are many varieties around the world. Varieties vary according to appearance and taste, growth rate, inner color such as white, yellow, red, and purple, and viscosity. For industrial use, the ones with high starch content and high yield are good, and for feed, ones that can harvest both sweet potatoes and vines are selected. In Korea, varieties such as Chungseung No. 100, Suwon No. 147, Shinmi, and Hwangmi are grown.

Sweet potato ingredients include 69.39% moisture, 27.7% sugar, and 1.3% protein, and the main ingredient is starch. Before World War II, most of them were consumed for food, but recently, only 40% of them were edible, so they are mainly used as snacks or snacks, not foods that supplement the staple foods as before. For industrial use, it is used about 30% for starch, and it is widely used as raw materials for syrup, glucose, sweets, processed edible products, pharmaceuticals, cosmetics, ethanol, whiskey, and soju. It is also used for feed for livestock such as pigs, and leaves and stems are used as green manure to maintain the productivity of the land.

An example of the use of such sweet potato cosmetics relates to a cosmetic for atopy containing a purple sweet potato extract, and more specifically, it shows a synergistic effect by containing triclosan and purple sweet potatoes together in Stepirococcus aureus, the atopic causative bacteria. Korean Patent Publication No. 10-2011-0131855, which discloses cosmetics for atopy using this, and ginkgo leaf extract, Myungaju extract, purple sweet potato extract, Seonhakcho extract, cacao extract, Wang elm bark extract, and fermented red ginseng extract at a certain blending ratio. There is Korean Patent No. 10-1931549, which discloses a cosmetic composition having a mixed composition of skin protection and whitening effect.

However, they only use the sweet potato tuber root as a cosmetic ingredient, and the scope of use is also limited. There are no suggestions on how to improve the effectiveness of the sweet potato tuber extract.

1. Korean Patent Publication No. 10-2011-0131855 2. Korean Patent No. 10-1931549

Therefore, the technical problem to be achieved by the present invention is to further expand the range of effect of the sweet potato tuber root extract and also use other extracts capable of synergistic effect on the sweet potato tuber root, for example, the effect of a cosmetic composition containing sweet potato extract. It is to provide a new cosmetic composition that has significantly increased.

In order to achieve the above technical problem, the present invention provides a cosmetic composition containing the sweet potato tuber root ethanol extract as an active ingredient, moisturizing the skin, whitening the skin, maintaining and improving skin elasticity, and preventing skin wrinkles.

The cosmetic composition according to the present invention as described above may further include a sweet potato pure ethanol extract.

The cosmetic composition according to the present invention as described above includes 0.001 to 20% by weight of the sweet potato tuber root extract and the sweet potato net ethanol extract, respectively, based on the total weight of the composition.

The composition according to the present invention as described above may further comprise 0.001 to 20% by weight based on the total weight of the pure vegetable leaf ethanol extract.

The present invention basically comprises a sweet potato tuber root ethanol extract, and further includes a sweet potato pure ethanol extract and a spontaneous leaf ethanol extract causing a synergistic effect on the sweet potato tuber root ethanol extract to moisturize the skin, whiten the skin, maintain or improve skin elasticity , It is a cosmetic composition that is very effective in preventing skin wrinkles, and ultimately can be usefully used for skin anti-aging effects.

Hereinafter, detailed contents for carrying out the present invention will be described.

The cosmetic composition according to the present invention basically contains a sweet potato tuber root ethanol extract as exhibiting skin moisturizing, skin whitening, skin elasticity maintenance or improvement, skin wrinkle prevention effect, and ultimately skin anti-aging effect.

The sweet potato used in the present invention is not particularly limited in its variety, and the extraction method using ethanol is also widely known in the technical field to which the present invention pertains, and may be used without particular limitation.

In addition, in the present invention, in order to increase the effect of the sweet potato tuber root extract, a sweet potato net ethanol extract may be further included, and the sweet potato sprout is also not limited to a specific variety, and the harvest time is also not limited.

The sweet potato tuber root ethanol extract and the sweet potato net ethanol extract as described above are preferably included in an amount of 0.001 to 20% by weight based on the total weight of the composition, respectively, and if it is less than that, it may exhibit an effect, and if it is contained in excess, further effects There is no increase, and it is not preferable because it may affect the stability of the formulation.

The composition according to the present invention may further include an ethanol extract of pure vegetable leaves in order to further increase the effect of the sweet potato extract, and preferably, the composition according to the present invention comprises 0.001 to 20% by weight based on the total weight of the composition. will be.

Regular sprouts are a dicotyledonous plant, a perennial plant in the family Buttercup, and its scientific name is Brasenia. As schreberi , it grows in ponds, but in the past, it was cultivated in rice fields to eat leaves and shoots, and it grows long with the rootstock spreading to the side, reaching 50-100cm, and the leaves float on the water surface. Leaves are alternate and oval, the back side is purple, and a petiole is attached in the center. When the leaf grows, it is surrounded by mucus-like mucus along with the young stem. Flowers bloom in May-August, are black reddish purple, look upward at the end of a long peduncle grown in the axil, and hang one at a time, about 2cm in diameter. There are 3 sepals and 3 petals each. There are 6-18 pistils, and there are nipple-shaped projections, and there are many stamens. The stamen surrounds the pistil and is longer than the pistil, and the central pistil head is bent outward. After the surgery withers, the pistil grows, forming a sticky mucus on the head.

In addition, the ethanol extract of the sweet potato tuber root, sweet potato sprout, and sprout leaves can be fermented by inoculating yeast.In this case, before inoculation of yeast, the ethanol extract of the ethanol extract was first vaporized to reduce the ethanol content or ethanol extract. Is concentrated and dried, dissolved in water, and used. In addition, it is preferably used after sterilizing the ethanol extract at 80 to 105°C, preferably 90 to 100°C for 0.5 to 24 hours, preferably 1 to 6 hours, in order to suppress the propagation of various bacteria.

In the present invention, the strain inoculated for the fermentation of the extract is yeast, preferably Issatchenkia Orientalis ( Issatchenkia orientalis ) is yeast. Inoculum size of yeast is 1 × 10 ⁷ cell / ml of yeast liquid sweet potato tuberous root, based on the sweet potato order of 0.001 to 10 parts by weight based on the ethanol extract 100 parts by weight of the sunchae leaf, preferably from 0.01 to 5 parts by weight, more Preferably, 0.1 to 3 parts by weight is used.

After inoculation of yeast into the extract, fermentation is performed at 25 to 40°C, preferably at 30 to 35°C for 18 to 78 hours, preferably 48 to 72 hours, and such fermentation includes moisturizing parts, whitening skin, and maintaining skin elasticity. Enhancement, brings about a remarkable increase in skin anti-wrinkle effect.

As described above, the cosmetic composition in the present invention may include ingredients commonly used in cosmetic compositions, and for example, conventional auxiliary agents such as antioxidants, stabilizers, solubilizers, vitamins, pigments and perfumes, and carriers Include.

Such a cosmetic composition may be prepared in any formulation conventionally prepared in the art. In one embodiment, it may be any one formulation selected from the group consisting of a high viscosity emulsifying formulation, a low viscosity emulsifying formulation, and a solubilizing formulation, but is not limited thereto. Depending on the formulation to be prepared, it may include a cosmetic composition formulation component commonly used in the technical field to which the invention belongs. For example, a solution, a suspension, an emulsion, a paste, a gel, a cream, a lotion, a powder, a soap, a surfactant-containing cleansing, an oil, a powder foundation, an emulsion foundation, a wax foundation, a pack, a massage cream, and a spray. However, it is not limited thereto. More specifically, flexible lotion, nutrition lotion, nutrition cream, massage cream, essence, eye cream, sun lotion, sun cream, makeup base, BB cream, cleansing cream, cleansing foam, cleansing water, pack, stick product, balm ( Balm) type products, spray or powder formulations.

Depending on the formulation to be prepared, additional water-phase ingredients, oily ingredients, surfactants, moisturizers, lower alcohols, thickeners, chelating agents, preservatives, fragrances, etc. can be selected and added in combination.

Hereinafter, the present invention will be described in detail through examples and experimental examples. It is clear that the present invention is not limited by the description of the above-described embodiments.

<Example 1: Preparation of the composition according to the present invention>

The tuber roots of the inner yellow sweet potato produced in Taean were crushed, and then 500 g of the crushed tuber roots were mixed with 1 liter of ethanol.

The mixed raw materials were immersed and extracted for 7 days at room temperature, and then filtered through 250 mesh and 0.5 μm filter paper to obtain a liquid extract. The obtained liquid extract was concentrated to prepare a composition according to the present invention.

<Example 2: Preparation of a composition according to the invention>

The same as in Example 1, and dried sprouts of yellow sweet potatoes produced in Taean, and then pulverized and further included 500 g of the pulverized product to prepare a composition according to the present invention.

< Example 3: Preparation of the composition according to the invention>

The same as in Example 2, except that the composition according to the present invention was prepared by further including 500 g of crushed dried spontaneous leaves.

< Example 4: Preparation of the composition according to the invention>

Same as Example 3, except that after heating the extract to evaporate ethanol, the residue was dissolved in purified water, and then 1 × 10 ⁷ cell/ml yeast (Isakenkia orientalis) was inoculated with 1 part by weight of the entire extract. Thereafter, fermentation was performed at 30° C. for 24 to 96 hours, followed by filtration to prepare a composition according to the present invention.

< Comparative example 1: Preparation of sweet potato pure ethanol extract>

The same as Example 1, but there is a difference in ethanol extraction using only sweet potato sprouts.

< Comparative example 2: Preparation of pure ethanol extract alone>

It is the same as Example 1, but there is a difference in ethanol extraction using only pure vegetable.

< Test example 1: skin moisturizing>

1. Cytotoxicity test

Cytotoxicity test was carried out using Moseman's method (Moseman TJ, Immuno Methods, 65, 55 (1983)) and Skaper's method (Skaper SD, et al, Cell Culture, 2, 17 (1990)). ,5-dimethylthiazol-2yl)-2,5-diphenyl-2H-tetrazolium bromide) was carried out using the measurement method.

Human keratinocytes HaCaT were purchased and used by Korean Cell Line Bank (Seoul, Korea). HaCaT was cultured in an animal cell incubator equipped with a 37° C., 5% CO 2 supply condition in a laboratory using DMEM medium containing 10% (V/V) FBS, 100 U/mL penicillin, and 100 g/mL streptomycin antibiotics.

The Example and Comparative Example compositions were dissolved in DMSO and added to the culture solution at 100 g/mL, and cells were cultured in the culture solution for 24 hours. MTT solution (5mg/mL) was treated and incubated for 4 hours, and then, the amount of formazan, which is a blue crystal produced, was measured for absorbance at 595nm using an ELISA reader. Toxicity to cells was expressed as a percentage of the average absorbance value of each control.

In order to investigate cytotoxicity in HaCaT keratinocytes, when treated at a concentration of 100 g/mL, the degree of change in cell proliferation was calculated compared to that treated with DMSO alone, and cytotoxicity was investigated.

In all the results, the cell viability was 95 to 98%, and it was found that there was no cytotoxicity in both the Example and Comparative Example compositions.

2. Moisture when applied to the human body Possessive evaluation

In order to evaluate the skin moisturizing effect on the compositions of Examples and Comparative Examples, the moisture retention ability was measured as follows for the skin to which the test substances of Examples and Comparative Examples were applied. The test substance was dissolved in purified water at 15% by weight.

Moisture retention is measured by applying a certain amount (0.1g/4㎠) inside the entire foil of 20 test subjects in a constant temperature and humidity room at room temperature of 22℃ and relative humidity of 45%, and skin before, 1 hour after application, and 2 hours after application. The moisture content of was measured. The measuring device used a moisture content meter (corneometer CM820, Courage + Khazaka, Cologne, Germany) that measures the moisture content of the skin by measuring the electric capacity of the skin according to the moisture content of the skin, and the results are shown in Table 1 below.

Electrical conductivity Before application 1 hour after application 2 hours after application Example 1 50 83 77 Example 2 50 85 80 Example 3 50 88 83 Example 4 50 90 85 Comparative Example 1 50 56 51 Comparative Example 2 50 56 51

From Table 1 above, the composition according to the present invention was able to confirm remarkably superior moisture retention ability compared to the composition of the comparative example, which proved to be a material having a very excellent moisturizing effect. The excellent effect in Examples 2 and 3 is due to the synergistic effect on the sweet potato sprout and sprout leaves extract, and in particular, looking at the results of Example 4, a synergistic effect due to fermentation can be confirmed.

3. Aquaporin -3 and Involukrin Synthesis acceleration effect experiment

In order to confirm the effect of increasing the synthesis of Involucrine, which plays an important role in the barrier and moisturizing function of skin cells, and Aquaporin-3, which plays an important role in water movement, the compositions of Examples and Comparative Examples were added to the cells as follows. After each treatment, it was confirmed through western blotting.

First, human keratinocytes were inoculated with HaCaT and cultured in DMEM medium, 37° C., 5% CO 2 by adding the compositions of Examples and Comparative Examples 24 hours later. After culturing for 24 hours, the cells were recovered, crushed, and only protein was extracted and stored at -40°C. The extracted protein was quantified through BCA saasy. Each sample was diluted with 30 g of protein, and electrophoresed on a 12% SDS-gel, and then transferred to a PVDF membrane. After reacting with the primary antibody (rabbit anti-aquaporins-3 antibody), the remaining antibody was washed away and reacted with a secondary antibody (rabbit HRP-coupled anti-IgG antibody).

After removing the remaining antibody, a reagent (peroxidase substrate and chromogen solution) that reacts with the antibody to cause a color reaction was added. The colored bands were measured and quantified through image analysis (BioRad, Universal Hood, USA), and the results are shown in Tables 2 and 3 below.

division Aquaporin-3 expression level (%) Control 100 Example 1 148 Example 2 153 Example 3 157 Example 4 163 Comparative Example 1 105 Comparative Example 2 103

As shown in Table 2, Comparative Examples 1 and 2 showed little effect compared to the control group, and Examples 1 to 4 according to the present invention showed an effect of 50% or more, and a synergistic effect in Examples 2 and 3. In particular, a remarkable synergistic effect was confirmed in Example 4.

division Expression level of involukrin (%) Control 100 Example 1 149 Example 2 153 Example 3 155 Example 4 164 Comparative Example 1 102 Comparative Example 2 101

When treated with HaCaT keratinocytes, the expression of involucrin, which plays an important role in skin barrier function and moisturizing, showed little effect compared to the control group, as shown in Table 2 above, according to the present invention. Examples 1 to 4 showed an effect of 50% or more, synergistic effect in Examples 2 and 3. In particular, a remarkable synergistic effect was confirmed in Example 4.

Through the above experimental results, the composition of the present invention was able to confirm excellent effects on skin barrier function and moisturizing.

< Test example 2: skin Mimac >

1. Confirmation of melanin production inhibitory effect

The compositions of Examples and Comparative Examples were added to the culture medium of mouse melanoma cells (B-16 mouse melanoma cells) to test the whitening effect at the cellular level. (Lotan R, Lotan D Cancer Res 40:3345-3350, 1980)

Before the experiment, toxicity was evaluated for the melanoma cells of mice, and a non-toxic concentration was selected to perform whitening evaluation.

The final concentration was 100 μg/ml, and the experiment was performed, and arbutin, a control, was added to the medium so that it became 100 μg/ml, treated with B-16 melanoma cells, and cultured for 3 days.

Thereafter, the cells were treated with trypsin, removed from the culture vessel, centrifuged, and melanin was extracted. The detached cells were boiled for 10 minutes by adding 1 ml of sodium hydroxide solution (1N concentration) to dissolve melanin, and the absorbance was measured at 400 nanometers (nm) using a spectrophotometer to measure the amount of melanin produced.

The amount of melanin was measured by a method expressed in terms of absorbance per unit cell count (10 ⁶ cells), and the amount of melanin production relative to the control group was calculated as an inhibition rate (%), and the results are summarized in Table 4. Also, the experiment was repeated 3 times.

sample Melanin production Inhibition rate (%) Negative control 0.065±0.002 - Positive control 0.033±0.001 49% Example 1 0.015±0.003 77% Example 2 0.012±0.001 81% Example 3 0.010±0.001 85% Example 4 0.007±0.003 89% Comparative Example 1 0.059±0.001 10% Comparative Example 2 0.059±0.001 10%

As can be seen from the results of Table 4, it was found that the composition of the present invention has a superior ability to inhibit melanin production with respect to the melanoma cells of the cultured mice when compared to arbutin, which is a whitening material known in the past, and Comparative Examples 1 and 2 The superiority of the composition according to the present invention was remarkably revealed by showing an incomplete effect of about 10% compared to the negative control group, and the synergistic effect of the sweet potato sprout extract on the sweet potato tuber root, the synergistic effect of the pure vegetable extract, especially a remarkable increase due to fermentation. The effect could be confirmed.

< Test example 3: Prevents skin wrinkles and maintains elasticity>

One. Elastase Inhibition rate measurement

The inhibitory effect of the activity of Elastase, an enzyme that degrades elastin, was confirmed as follows.

For Elastase, Elastase derived from human leukocyte cells was used, and MeOSuc-Ala-Ala-Pro-Val-pNA, a synthetic substrate, was used as a substrate for Elastase. As the buffer solution, a 100 mM Tris (pH 7.5) solution was used. Elastase was finally used as 0.2mU using a buffer solution. In addition, the synthetic substrate of Elastase was diluted with a buffer solution to a final concentration of 05 mM after making a 100 mM solution using DMSO.

At this time, the positive control was set to contain quercetin, known as an elastase inhibitor, at a concentration of 100 ppm. Samples of Examples and Comparative Examples were also added to be 100 ppm. The reaction was carried out in a 96-well plate and allowed to react at room temperature for 20 minutes. The absorbance was measured at 405 nm at 1 minute intervals using a spectrophotometer, and the slope of the absorbance versus time was determined to determine the activity of the enzyme. The elastase inhibition rate was calculated as follows, and the results are shown in Table 5.

sample Elastase inhibition rate (%) Positive control 43.12% Example 1 77.29% Example 2 82.34% Example 3 85.21% Example 4 88.21% Comparative Example 1 42.18% Comparative Example 2 42.36%

As can be seen from the results of Table 5, it was found that the composition of the present invention has a very excellent elastase inhibitory ability, and even though it showed some effect in Comparative Examples 1 and 2, it was more insufficient than Example 1, and this was carried out. In Examples 2 and 3 included in Example 1, excellence was remarkable, which was confirmed to have a synergistic effect of the sweet potato sprout extract on the sweet potato tuber root, the synergistic effect of the pure vegetable extract, and particularly a remarkable synergistic effect by fermentation.

2. Collagenase Inhibition rate measurement

The inhibitory effect on the activity of collagenase, an enzyme that degrades collagen, was confirmed as follows.

Collagenase was used as a collagenase derived from rat interest, and a synthetic substrate, N-(3-[2-Furyl]acryloyl)-Leu-Gly-Pro-Ala, was used as a substrate for collagenase. As a buffer solution, a solution in which 50mM Tricine, 10mM CaCl ₂ ·H ₂ O, and 400mM NaCl (pH7.5) was dissolved was used. The synthetic substrate was dissolved in a concentration of 10 mM using a buffer solution and then diluted to a final concentration of 75 μM. Collagenase was dissolved at a concentration of 1 unit/ml in 4 degrees of cold, tertiary distilled water, and finally diluted to 0.05 unit/ml using a buffer solution.

Samples of Examples and Comparative Examples were tested at a final concentration of 100 ppm. At this time, the positive control group was set to have a final concentration of 100 ppm of epigallocatechin gallate (EGCG), which has a known collagenase inhibitory effect. The reaction was carried out in a 96-well plate and allowed to react at room temperature for 10 minutes. The absorbance was measured at 345 nm at 1 minute intervals using a spectrophotometer, and the maximum slope of the absorbance versus time was determined as the activity of the enzyme. The collagenase inhibition rate was calculated as follows, and the results are shown in Table 6.

sample Collagenase inhibition rate (%) Positive control 42.12% Example 1 68.18% Example 2 71.25% Example 3 75.28% Example 4 80.12% Comparative Example 1 39.15% Comparative Example 2 39.18%

As can be seen from the results of Table 6, it was found that the composition of the present invention has very excellent collagenase inhibitory ability, and although it showed some effect in Comparative Examples 1 and 2, it was more incomplete than Example 1, and this was carried out. In Examples 2 and 3 included in Example 1, the excellence was remarkable, which proves the synergistic effect of the sweet potato sprout extract on the sweet potato tuber root, the synergistic effect of the pure vegetable extract, and in particular, a remarkable synergistic effect by fermentation.

3. Measurement of cell proliferation effect

In order to confirm the activation of skin cell proliferation, human fibroblasts were used to measure cell proliferation activity.

After adding the compositions of Examples and Comparative Examples of 10 μg/ml to the culture solution, human fibroblasts were cultured to perform the MTT reduction method, and the formazan product was extracted with isopropyl ethanol, and the absorbance was measured at 570 nm. Thus, the cell proliferation activity was compared relative. At this time, as a negative control, a culture solution without a sample was used. The measured results were calculated numerically using the following formula, and the results are shown in Table 7 below.

Cell proliferation capacity (%) = absorbance in each sample group/absorbance in control group

sample Cell proliferation activity (%) Example 1 137.28% Example 2 139.18% Example 3 142.28% Example 4 144.14% Comparative Example 1 112.15% Comparative Example 2 115.18%

As can be seen from the results of Table 7, the composition of the present invention showed very excellent cell proliferation activity compared to the cell proliferative activity (100%) of the untreated control group, and also showed some effect in Comparative Examples 1 and 2. B. It was more incomplete than Example 1, and the excellence was remarkably shown in Examples 2 and 3, which were included in Example 1, which was a synergistic effect of sweet potato sprout extract against sweet potato tuber roots, synergistic effect of pure vegetable extract, especially fermentation. It is to prove the remarkable synergistic effect by.

As a result of the above examination, it was found that the cosmetic composition according to the present invention is excellent in maintaining and improving skin elasticity and preventing skin wrinkles, and is the best cosmetic composition that can ultimately prevent skin aging.

In summarizing the above-described test examples, the composition according to the present invention has remarkably excellent advantages in skin moisturizing, skin whitening, maintaining or improving skin elasticity, anti-wrinkle effect, and ultimately skin anti-aging effect.

Claims (4)

Cosmetic composition containing ethanol extract of sweet potato tuber root as an active ingredient to moisturize skin, whiten skin, maintain and improve skin elasticity, and prevent skin wrinkles.
. The cosmetic composition according to claim 1, wherein the composition further comprises a sweet potato pure ethanol extract.
The cosmetic composition according to claim 2, wherein the composition further comprises an ethanol extract of pure vegetable leaves.
The cosmetic composition according to claim 3, wherein the sweet potato tuber ethanol extract, sweet potato pure ethanol extract, and pure vegetable leaf ethanol extract are contained in an amount of 0.001 to 20% by weight, respectively, based on the total weight of the composition.