Mega Antioxidant and Chelated Mineral make up USANA’s Essentials of great nutrition. Mega Antioxidant is USANA’s daily vitamin and antioxidant supplement for adults. Chelated Mineral is USANA’s daily mineral supplement for adults. Together, they have repeatedly been given top rankings in the NutriSearch Comparative Guide to Nutritional Supplements. New USANA customers start with the Essentials to build a strong foundation of health.