Ingredient Guides4 min read
Lactic Acid: An AHA That Is Also a Humectant
Lactic acid exfoliates as an AHA and pulls in moisture as a humectant. Here is how those two jobs and CAS 50-21-5 show up on a filing.
June 11, 2026Read
Tagged aha
Concentration Limits4 min read
AHA Leave-On Concentration Limits Explained for Makers
The alpha hydroxy acid leave-on ceiling, why pH matters alongside it, and why a sun warning usually rides along.
May 7, 2026Read
Concentration Limits3 min read
Mandelic Acid and Whether It Shares the AHA Limit
Mandelic acid is chemically an AHA, and makers formulating gentler exfoliants need to treat it with the same concentration discipline.
March 20, 2026Read
Concentration Limits3 min read
Glycolic Acid Percentage Where a Peel Stays Cosmetic
Where the concentration and pH line sits between an at-home glycolic acid product and something that crosses into professional-peel territory.
March 9, 2026Read
Concentration Limits4 min read
Combining an AHA and a BHA in One Formula Legally
How to track two separate acid concentration limits at once when a product carries both an AHA and a BHA.
February 27, 2026Read
Ingredient Guides4 min read
Glycolic Acid: AHA Concentration and pH Limits to Watch
Glycolic acid's INCI name and CAS number, and how AHA concentration paired with pH determines its cosmetic notification status.
January 25, 2026Read
Concentration Limits3 min read
BHA Leave-On Limits and Why They Differ From AHAs
Why salicylic acid and glycolic acid sit under different concentration ceilings, and how to avoid applying the wrong one.
January 14, 2026Read
Concentration Limits3 min read
Citric Acid as a pH Adjuster and Its Practical Ceiling
Why a pinch of citric acid to correct pH is a completely different regulatory conversation than an AHA exfoliation claim.
January 11, 2026Read