The Blemicalm Azelaic Acid 15% Clarifying Serum cannot be purchased in the US because azelaic acid at concentrations above 10% is classified as a prescription drug by the FDA. In the US, over-the-counter products are limited to a maximum of 10% azelaic acid, which is why we offer a 10% version for the US market. The 15% concentration is available in other countries where regulations allow for higher concentrations of azelaic acid in cosmetic products.
Apr 10, 2025