Ingredients

Tartaric Acid

Written by Reviewed by the SYNC editorial team Published Last reviewed Editorial standards

Tartaric Acid — an alpha hydroxy acid found in grapes that offers gentle exfoliation and also helps stabilize the pH of acid formulations. It is often included in blends both for its mild exfoliating effect and its ability to buffer other acids so they perform consistently. Its larger molecule makes it relatively gentle on the skin.

Key points

  • Tartaric acid is a grape-derived AHA that contributes gentle surface exfoliation.
  • It is frequently used as a pH buffer, helping keep multi-acid formulas stable and effective.
  • Its molecular size is larger than glycolic acid, generally making it milder on the skin.
  • It is most commonly seen as a supporting ingredient rather than a standalone star active.
  • As with all AHAs, sun sensitivity can increase, so daily sunscreen is recommended.

Frequently asked

What role does tartaric acid play in a formula?

It offers gentle exfoliation and also acts as a buffering agent that helps stabilize the pH of a product, supporting the performance of other acids. This dual role is why it often appears in blended exfoliants.

Is tartaric acid safe for regular use?

In cosmetic concentrations it is generally well tolerated, especially since it is relatively gentle, but standard exfoliant precautions like patch testing and sunscreen apply. Follow the specific product's directions.

Related topics

This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.

Encyclopedia

Further reading

This entry was written and checked against the sources below. They are published by clinical and scientific bodies, they are listed most readable first, and each one opens in a new tab. They are background for the whole entry rather than footnotes to individual sentences.

  1. Chemical peels (face peels) DermNet NZ Clinical guidance dermnetnz.org
  2. Cosmetics Alpha Hydroxy Acids U.S. FDA Regulatory and safety fda.gov
  3. Guidance for Industry: Labeling for Cosmetics Containing Alpha Hydroxy Acids U.S. FDA Regulatory and safety fda.gov
  4. Evaluating the Efficacy and Safety of Alpha-Hydroxy Acids in Dermatological Practice: A Comprehensive Clinical and Legal Review PubMed Central Peer-reviewed, open access pmc.ncbi.nlm.nih.gov
  5. Cosmetic and dermatologic use of alpha hydroxy acids PubMed Peer-reviewed (abstract) pubmed.ncbi.nlm.nih.gov
  6. Evaluating the Efficacy and Safety of Alpha-Hydroxy Acids in Dermatological Practice: A Comprehensive Clinical and Legal Review PubMed Peer-reviewed (abstract) pubmed.ncbi.nlm.nih.gov

SYNC does not publish medical advice. Nothing here replaces a consultation with a doctor or a pharmacist about your own skin.