Diglucosyl gallic acid (DGA)
Diglucosyl gallic acid (DGA) is a cosmetic ingredient studied for tone-related and antioxidant effects. It appears in some topical skincare and peel formulations. It is not interchangeable with trichloroacetic acid (TCA) or monochloroacetic acid (MCA) and does not define peel depth.
What research has tested
A 2022 study assessed laboratory antioxidant and tyrosinase-related activity and topical cosmetic emulsions in 20 volunteers. The findings concern the tested formulas, not every product containing the ingredient.
Its role in a peel formula
A manufacturer ingredient list includes DGA alongside glycolic and azelaic acid in a peel. This supports formulation inclusion rather than independent proof of all advertised benefits. The whole acid blend and instructions determine the procedure.
Questions about the formula
Ask which ingredients produce exfoliation, what DGA is intended to contribute and what evidence supports the finished formula. Ingredient identity alone does not establish the peel’s depth, results or suitability for your skin.
Read the original sources
Sources describe specific products, studies or countries. They do not establish approval everywhere.
General education. Your clinician can assess your individual suitability. Rules depend on the treatment country; FDA references concern the United States. External sources may be in another language.