@noahcne: A lot of OTC skincare names an ingredient without ever naming an effective dose, or names a percentage that a water-based formula cant actually deliver into your skin. Prescription strength has been through trials proving the exact formulation works. It also tends to cost less than the fancy serum. Save this. Not medical advice. #skincareformen #mensskincare #skincarescience #azelaicacid #niacinamide