* Vitamin Supplement * 10% Free * Helps Neutralize Free Radicals and Supports A Healthy Immune System * Guaranteed Quality - Laboratory Tested Vitamin C is an important antioxidant nutrient that helps neutralize free radicals which may cause cellular damage in the body. Vitamin C also supports a healthy immune system. 21st Century prolonged release Vitamin C-1000 provides long-term vitamin supplementation by slowly releasing nutrients to the body over an extended period of time.