Pharmavite makers of Nature Made®, a leading national brand of Vitamins and Supplements in food, drug, mass and club retail outlets, and a top 10 brand in the Health and Beauty category. USP Verified. Nature Made was the first national supplement brand to have a product verified by United States Pharmacopeia (USP). Today, Nature Made is the national vitamin brand with the most products carrying the USP Verified Mark—verification that the products meet stringent quality criteria set forth by USP.