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
Tagged bha
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