This serum combines a high concentration of niacinamide (vitamin B3) with zinc salt of pyrrolidone carboxylic acid to purify and refine the complexion. Perfect for those with sensitive skin. <br><br> <b>What it does</b><br>Refines the appearance of uneven texture<br> Helps balance excess oil production<br> Purifies congested skin <br><br> <b>PH LEVEL:</b>Formula pH Level: 5.00 - 5.60 <br><br> All of our formulas are developed to be pH appropriate to support skin health and ensure optimal potency. <br><br> Our mission is to create clinically-effective, biocompatible skincare formulated with both potent natural ingredients and advanced synthetic ingredients. Our products utilize efficacious levels of active ingredients, are pH level appropriate, and are thoroughly tested for safety.