Vitamin C serum tests like the Betadine experiment only prove the presence of antioxidants—not their effectiveness on your skin. Most serums use L-Ascorbic Acid, which oxidizes quickly and can irritate sensitive skin. PHD’s 10% Vitamin C Brightening Serum uses 3-O-Ethyl…

Thinking of buying a Vitamin C serum? ✨ WAIT! Before you add one to your cart, watch this video to avoid the biggest mistakes people make while choosing Vitamin C for their skin. In this video, I’m breaking down the…