What is Ascorbic Acid?

Antioxidant

Ascorbic Acid is an antioxidant that keeps the formula from going off.

This ingredient is listed in CosIng, the EU's cosmetic ingredient database. CosIng lists what it's used for as: Antioxidant, Buffering, Fragrance, Skin conditioning.

CosIng function classes are the EU's standard list of the jobs an ingredient does inside a product, such as moisturizing, emulsifying, or preserving.

Which products feature it?

89 of the 2320 products we've checked feature this as a key ingredient. Products that disclose a concentration or list it near the top of the ingredient list come first.

Showing 1 to 12.

COSRX
Advanced The Vitamin C 23 Serum
Key: Ascorbic Acid (#2 on the ingredient list · 23%), 3-O-Ethyl Ascorbic Acid, Niacinamide
Official (Korean)
1 claim checked
claims, checked
Low-irritation skincare for sensitive skin, 56 global beauty award winsnothing specific to check
DR.DIFFERENT
CEQ Antioxidant Serum
Key: Ascorbic Acid (#2 on the ingredient list · 15%), Arbutin, Adenosine
Official (Korean)
4 claims checked
claims, checked
Centered on Vitamin C 15%backed by evidence
Brightening bare face with pure Vitamin Cplausible, not tested
Vitamin E·CoQ10 synergy designpartly backed
Clinically proven 7-way improvement antioxidant serumoverstated
sidmool
Vita5 Diatomite Modeling Rubber Mask
It's made for better hydration.
Key: Ascorbic Acid (#6 on the ingredient list · 1%), Diatomaceous Earth 80%, Retinol 0.01%
Official (Korean)
9 claims, summarized
Only partly backed:
better hydration
Don't count on:
less visible pores · a brighter skin tone · firmer skin · a smoother skin texture
See each claim
claims, checked
Vita 5 Diatomite Modeling Packbacked by evidence
Complex Multi-Vitamin Prescriptionbacked by evidence
Applies ascorbic acid, also known as vitamin Cbacked by evidence
US-made diatomite Pore & Kerato carepartly backed
Provides a moisturizing function to keep skin moistpartly backed
Retains skin elasticity and youthoverstated
It is a natural functional derma cosmetic to solve your skin concerns.no supporting source found
For pores + dead skin cells + adsorption + moisturizing + brightening + elasticity, the Vita5 Modeling Pack made from plant-derived ingredients beautifully cares for your skin texture.contradicted by sources
Helps care for weakened skinnothing specific to check
Derma Factory
Pure Vitamin C E Ferulic Ampoule
Key: Ascorbic Acid (#4 on the ingredient list), Ferulic Acid, Ethyl Ascorbyl Ether
오베드
Brightening Mask
Key: Ascorbic Acid (#6 on the ingredient list), Niacinamide, Hyaluronic Acid
The Medi Dr.
Lacto Detok Powder Wash
Key: Ascorbic Acid (#8 on the ingredient list), Papain, Sodium Cocoyl Isethionate
Official (Korean)
4 claims checked
claims, checked
Because it contains pure vitamin, it may sting. If your skin is sensitive to vitamins, please test on the back of your neck before use.backed by evidence
Moist and smooth powder wash that cares with lactic acid bacteriapartly backed
Secondary cleanser / blackhead removal / nutrition / moisturepartly backed
Refer to product detailsnothing specific to check
팜드웨이
Wanjeon Soap
Key: Ascorbic Acid (#8 on the ingredient list), Tocopherol, Silk Amino Acids
LINDSAY
VITAMIN MODELING MASK CUP PACK
It's made for better hydration and firmer skin.
Key: Ascorbic Acid (#12 on the ingredient list), Niacinamide, Adenosine
Official (Korean)
16 claims, summarized
Only partly backed:
better hydration (amount unknown) · firmer skin (amount unknown)
See each claim
claims, checked
Vitamin (bright skin & moisturizing)plausible, not tested
A modeling mask (disposable) that can be conveniently managed with one cupplausible, not tested
We created a disposable modeling pack in a cup so that the modeling mask pack, which was previously used only in large quantities, can be used easily and conveniently every day. Because the cup contains a water-adjusting spatula, no separate pack tools are needed, and it is an ultra-easy disposable cup pack with a simple water-adjusting method. If you just have the Lindsay Modeling Cup Pack, you can easily and conveniently use a modeling pack anytime, anywhere.plausible, not tested
Containing ascorbic acid (vitamin C), mandarin (tangerine) peel, and others, it helps brighten the skin, and containing various nutritional/moisturizing ingredients, it helps make the skin firm and healthy.partly backed
Bright skin Brightening / Moisturizing Moisturizeno supporting source found
That feeling you got at the skin care salon, just as it is!no supporting source found
Lindsay Modeling Pack No. 1 in the peel-off pack category! Won No. 1 at various beauty awards!no supporting source found
Consumer selected - Won No. 1 at various beauty awardsno supporting source found
No. 1 in the peel-off pack category!no supporting source found
Achieved No. 1 in Naver Shopping's weekly popular brand for peel-off packs! (No. 1 for 8 consecutive years)no supporting source found
No. 1 in Naver Shopping real-time search!no supporting source found
Leading K_BEAUTY, No. 1 in sales records at Olive Young, duty-free shops, and other retailers! Achieved No. 2 in customer satisfaction!no supporting source found
🏆 No. 1 in peel-off packs at various beauty awards , No. 1 in modeling packs on Naver Shopping 🏆no supporting source found
#RadiantSkin #FullOfNutrition #Moisturizingnothing specific to check
Bright skin & nutritionnothing specific to check
Now, easily manage your skin at home.nothing specific to check
S.NATURE
WHITE GLOW AMPULE MASK
It's registered in Korea as a functional cosmetic for brightening and wrinkle improvement.
Key: Ascorbic Acid (#12 on the ingredient list), Niacinamide, Adenosine
Official (Korean)
50 claims, summarized
You can expect:
less visible dark spots · softer-looking fine lines
Only partly backed:
calmer skin (amount unknown) · better barrier support (amount unknown) · a brighter skin tone · firmer skin
See each claim
claims, checked
Functional for whitening and wrinkle improvementbacked by evidence
Intensive brightening careplausible, not tested
Skin tone improvementplausible, not tested
Vitamin C improves clear skin toneplausible, not tested
Whitening effect, skin soothingplausible, not tested
Vitamin B3 key whitening ingredientplausible, not tested
Bestows gentle daily home care with a whitening formula usable both day and night.plausible, not tested
Bright edelweiss flower energy's rich whitening ampoule in one sheet!partly backed
Contains esnature's proprietary whitening ingredient Whitening-7complex, carefully packed with edelweiss flower, glutathione, vitamin C, mulberry bark extract, and niacinamide.partly backed
Also contains skin barrier, soothing, and adenosine ingredients to care for whitening, soothing, and wrinkle improvement all at once.partly backed
Product satisfaction 100%partly backed
Skin brightening improvementpartly backed
Skin clarity improvementpartly backed
Skin glow improvementpartly backed
Contains esnature whitening formula WHITENING 7- COMPLEX!partly backed
Non-irritating vegan-certified sheetpartly backed
Firm skin barrier Secoljipartly backed
Contains Secolji & natural moisturizing factors that firm up and custom-care the skin barrierpartly backed
Contains esnature antioxidant formula WHITENING-7 COMPLEXpartly backed
Intensively contains the '7 whitening ingredients' carefully selected by esnature for efficacy and safetypartly backed
Helps with intensive brightening care, bestows white jade glow skin, and boosts whitening effectpartly backed
Immediate skin tone (skin brightness, brightening) improvement effect test completedpartly backed
Immediate skin clarity (clearness) improvement effect test completedpartly backed
Immediate skin gloss (glow) improvement effect test completedpartly backed
Even with 1 use, clear and transparent! Intensive brightening carepartly backed
Contains a rich whitening ampoule in one sheet and rapidly delivers active ingredients to skin to help with whitening and wrinkle improvement.partly backed
Skin gloss (glow)partly backed
Skin clarity (clearness)partly backed
Not only effective whitening care, it contains essential ingredients that protect the skin barrier, 'ceramide + cholesterol + fatty acids', and natural moisturizing factors 'hyaluronic acid 8 types + betaine + arginine', to care for the skin barrier firmly.partly backed
Vegan certification completedpartly backed
Derma test completedpartly backed
Possesses OEKO-TEX grade 1partly backed
With a bamboo-derived high-adhesion sheet containing a rich whitening ampoule, make dull skin tone white and bouncy!partly backed
Made of light and soft fabric, it does not irritate the skin.overstated
Improves skin tone clearly and brightly with edelweiss flower energyno supporting source found
Bamboo-derived high-adhesion sheetno supporting source found
Rapidly delivers active ingredients to skinno supporting source found
Bestows skin glow with plant cell extract resembling skin structureno supporting source found
Vitamin E boosts whitening effectno supporting source found
Whitening is a game of persistence! Good ingredients, sensitive skin OK, firm barrier + bouncy moistureno supporting source found
Low-irritation test completedno supporting source found
High-adhesion bamboo-derived sheet obtained from natureno supporting source found
Using a bamboo-derived microfiber sheet with high moisture absorption, it adheres firmly to the skin and rapidly delivers active ingredients to the skin.no supporting source found
The closer to the skin, the gentler the sheet! Safe microfill sheetno supporting source found
Time to find my own white jade glow(光) radiancenothing specific to check
#GlassBeadGlow #SkinClarity #BouncyElasticitynothing specific to check
Found it, white jade glow(光)skin!nothing specific to check
1 drop of rich edelweiss flowernothing specific to check
For bright and clean skinnothing specific to check
Bestows glass bead glow & white jade glow skinnothing specific to check
sidmool
Glutathione Mild Blemish Toner
Key: Ascorbic Acid (#13 on the ingredient list), Niacinamide 2%, Tranexamic Acid
Official (Korean)
4 claims checked
claims, checked
Glutathione (Glutathione) + L-Cysteine + Cyanocobalamin + Tranexamic Acidbacked by evidence
11 kinds of vitamin COMPLEXbacked by evidence
Real white jade whitening care containing special active ingredients!partly backed
A daily mild toner containing a heart that wants to tint you with a pink glow for dark spots and blemishes!nothing specific to check
AOU GLAISE
Outdoor Vita-Toning Patch Large 10pcs (Pouch Type)
Key: Ascorbic Acid (#14 on the ingredient list), Niacinamide, Adenosine
ROUND LAB
ROUND LAB BIRCH JUICE MOISTURIZING CLEANSER
It's made for better hydration.
Key: Ascorbic Acid (#14 on the ingredient list), Glyceryl Glucoside, Hyaluronic Acid
Olive Young US Amazon· Seller not confirmed Official (Korean)
31 claims, summarized
Only partly backed:
better hydration (amount unknown) · a brighter skin tone
Don't count on:
less visible pores
Tests passed:
skin irritation
See each claim
claims, checked
Soft and moist water gel formulabacked by evidence
*The more moisture fills the skin, the brighter the blue light becomes.plausible, not tested
Moist boun-cy! Hydrating gel cleanserpartly backed
Clinically proven cleansing effectpartly backed
Cleansing is basic, but this moist gel cleanser also fills moisturepartly backed
Skin moisturization improvement effectpartly backed
5.18% increasepartly backed
Containing the refreshing moisture of Inje birch to keep skin moist all daypartly backed
Inje birch sap, grown with the refreshing energy of cool breezes, is rich in amino acids and minerals, supplying moisture to dry skin to keep it hydrated.partly backed
Deeper moisture with glyceryl glucoside that opens the moisture pathwaypartly backed
Charge moisture and vitality with Vita-Hyaluronic Acidpartly backed
Slightly acidic cleansing that balances the skinpartly backed
With a slightly acidic pH similar to healthy skin, it removes impurities cleanly and minimizes damage to the skin barrier, protecting the skin comfortably even after cleansing.partly backed
The bouncy gel texture creates soft foam when it meets water, helping gentle, close-up cleansing without irritation.partly backed
Skin irritation testpartly backed
German Derma testpartly backed
Judged as a non-irritating product in terms of primary skin irritationpartly backed
No relevant skin reactions were detected in the test area following a single product application.partly backed
Made with soy ink on FSC-certified boxes to protect forests.partly backed
When you need rising moisture, a moisture line that recharges tired skin.partly backed
Skin concerns STOP Clean cleansing that removes with moisture!no supporting source found
Gel cleansers have weak cleansing power? Stop the misconception!no supporting source found
Cleansing power effect against fine dust simulantno supporting source found
Cleansing power effect on sunscreenno supporting source found
Cleansing power effect on pore impuritiesno supporting source found
Glyceryl glucoside, a key ingredient of the resurrection plant, activates *aquaporins, the water channels in the skin, to help provide powerful moisture.no supporting source found
Powerful synergy of Vitamin C and Hyaluronic Acid!no supporting source found
It forms a Vita moisture barrier on skin that has been irritated by external environment and lost moisture, making it moist and lively.no supporting source found
Round Lab creates cosmetics that even sensitive skin can use with peace of mind.no supporting source found
#AmpouleCleanser #MoistCleansingno supporting source found
Cosmetics that make your skin betternothing specific to check

Often featured alongside it

Are the claims about it backed up?

We checked each claim that features this ingredient. Open the list below to see the result for each one.

See the results by claim

Result	Claims
backed by evidence	9 of 54
plausible, not tested	7 of 54
partly backed	19 of 54
overstated	9 of 54
no supporting source found	7 of 54
nothing specific to check	3 of 54

These are counts of claims, not products. One product can name the same ingredient in several claims, and we checked each one on its own.