The library

Ingredient library

Every ingredient SkinAtlas knows about — all 2161 of them. What each one does, what it works well with, and what to watch for.

9 ingredients in Antioxidant matching "acid"

Antioxidant
3-O-Ethyl Ascorbic Acid

A stable vitamin C derivative that converts to ascorbic acid in the skin to brighten and provide antioxidant protection.

brighteningantioxidant
Stable, water-soluble vitamin C derivativeBrightens and evens skin toneHelps fade hyperpigmentation
+ Niacinamide+ Tocopherol+ Hyaluronic Acid
Antioxidant
Ascorbyl Dipalmitate
ASCORBYL DIPALMITATE

The dipalmitoyl ester of ascorbic acid (vitamin C). An oil-soluble vitamin C derivative with improved stability vs. pure ascorbic acid. Penetrates lipid-rich skin layers. Used in Lululun's Hydra EX mask.

antioxidantskin-brightening
Oil-soluble vitamin C — good skin penetrationAntioxidant protectionSkin brightening
Fat-soluble form; less studied than ascorbic acid for brightening efficacy
+ Tocopherol+ Ferulic Acid
Antioxidant
Caffeic Acid

A naturally occurring hydroxycinnamic acid found in coffee, wine, and many plants; potent antioxidant used in prestige creams for its UV-protective, anti-inflammatory, and brightening polyphenol activity.

antioxidantanti-inflammatorybrightening
Hydroxycinnamic acid with potent antioxidant and UV-protective propertiesAnti-inflammatory activity helps reduce rednessMay inhibit melanin synthesis for a mild brightening effect
+ Tocopherol+ Ascorbic Acid
Antioxidant
Ethyl Ascorbyl Ether

A stable, both water- and oil-compatible vitamin C derivative that converts to ascorbic acid in skin. Valued for brightening with good formula stability.

antioxidantbrightening
BrightensEvens toneAntioxidant protection
+ Niacinamide+ Tocopherol+ Ferulic Acid
Antioxidant
Ferulic Acid

A plant antioxidant that stabilizes and boosts vitamins C and E.

AntioxidantStabilizes vitamin CBoosts UV protection
+ Ascorbic Acid+ Tocopherol
Antioxidant
Oleanolic Acid

A pentacyclic triterpene naturally found in olive leaves, olive oil, and rosemary. In cosmetics, used for its antioxidant, anti-inflammatory, and mild tyrosinase-inhibiting (brightening) properties. Also studied for its role in supporting the skin's own ceramide synthesis pathway.

antioxidantanti-inflammatoryskin-brightening
Pentacyclic triterpene with potent antioxidant and anti-inflammatory activityMay inhibit tyrosinase to support a brighter, more even skin toneFound naturally in olive oil and rosemary; supports the skin barrier lipid matrix
+ Niacinamide+ Tocopherol+ Ceramide NP
Antioxidant
Sodium Ascorbate
SODIUM ASCORBATE

The sodium salt of ascorbic acid (vitamin C). More stable and less acidic than pure ascorbic acid, with a neutral pH. Used as an antioxidant and brightening agent in skincare. Found in Sana's eye cream.

antioxidantskin-brightening
Water-soluble vitamin C — antioxidant protectionSupports collagen synthesisSkin brightening
Less potent than ascorbic acid at equal concentrations — requires higher loading for brightening
+ Tocopherol+ Niacinamide+ Ferulic Acid
Antioxidant
Tannic Acid

A plant-derived polyphenol (from oak bark, chestnut, and other sources) with astringent, antioxidant, and anti-inflammatory properties used in pore-refining and soothing formulations.

astringentantioxidantantimicrobialskin-conditioning
Tightens skin and reduces appearance of pores via astringent actionProtects skin from oxidative stress as a polyphenol antioxidantAnti-inflammatory: calms redness and irritation
May cause dryness or irritation at high concentrationsCan be sensitizing for very sensitive skin types
Antioxidant
Thioctic Acid

Alpha-lipoic acid, a fast-acting antioxidant that is both water- and fat-soluble, letting it work throughout the skin to neutralize free radicals.

antioxidant
Potent antioxidantHelps smooth textureSupports radiance
+ Tocopherol+ Ascorbic Acid+ Niacinamide