What is Tartaric Acid?
Tartaric Acid is an alpha hydroxy acid (AHA) found naturally in grapes and tamarind, and it is one of the main acids in wine. The tartaric acid used in cosmetics is typically a purified form of the natural compound.
In skincare it is mostly a supporting ingredient. Its main job is to help keep the pH in the range other AHAs need to exfoliate. Some formulas also include it for its own mild exfoliating and antioxidant effect.
Source
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Found in |
Tartaric Acid (INCI name) |
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Origin |
Occurs naturally in grapes, tamarind and other plants; typically a by-product of winemaking |
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Also known as |
AHA, fruit acid, grape acid |
Top features and benefits
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Supports the pH needed for AHA exfoliation |
Mild exfoliating effect |
Has antioxidant properties |
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Natural fruit-acid origin |
Often used with glycolic or lactic acid |
Found in exfoliating serums and peels |
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Low-key supporting ingredient |
Considered safe as used in cosmetics |
Works at low levels |
How Does It Work?
Tartaric acid works in the same basic way as other AHAs: it helps loosen the bonds between dead skin cells so they can shed more easily. This can leave skin smoother and fresher-looking over time.
Its more practical role is behind the scenes. Exfoliating acids only work well in a certain pH range, and tartaric acid helps formulators keep a blend in that range, so it often appears alongside better-known acids like glycolic and lactic acid.
Compared with glycolic and lactic acid, tartaric acid's skin benefits are less researched. Laboratory work has suggested that its breakdown products can act like ceramides in a model of the skin's fatty layer, but it is not known whether this happens on real skin with normal cosmetic use.