Metabolic C™ Optimized Vitamin C for Enhanced Antioxidant Protection Source Naturals Metabolic C™ is activated vitamin C, utilizing advanced PureWay-C®. Initial in-vitro studies suggest that naturally derived vegetable lipid metabolites may improve the uptake, delivery, and retention of vitamin C. The strong antioxidant activity of Metabolic C is upgraded support for your immune system, circulatory system, liver, joints, and skin.PureWay-C® is a registered trademark of Innovation Laboratories, Inc.* 500 mg Capsule Option Available: 90, 180 Suggested Use: 1 capsule up to four times daily. Allergies: Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.