What it does
- Gently exfoliates for smoother, brighter skin.
- Helps buffer and stabilise acid blends.
- Common in multi-acid exfoliating products.
How it works
Tartaric acid is a larger AHA widely documented for gentle exfoliation and good buffering behaviour, which makes it useful for keeping multi-acid formulas at a stable, effective pH. Free-acid activity needs a low pH.
Use level
- Typical use level
- typically 1–10% (often in AHA blends)
Commonly used at 1–10% at low pH, frequently within AHA blends. Increases sun sensitivity when exfoliating.
Formulation considerations
- Water-soluble; low pH drives exfoliation.
- Good buffering behaviour in acid blends.
- Sun-sensitivity labelling applies.
What it pairs with & what to avoid
Pairs well with
- Other AHAs (blends)
- Hydrators
Use with care / avoid
- Skipping sunscreen
Regulatory status
Tartaric acid is listed in the EU CosIng database. As an AHA it carries sun-sensitivity labelling considerations.
Common questions
What does tartaric acid do?
It gently exfoliates and helps buffer acid blends to a stable, effective pH.
What percentage of tartaric acid is used?
Commonly 1–10% at low pH, often within a blend.
Is tartaric acid gentle?
It is a larger, comparatively gentle AHA, often used alongside others.