Ester C is a breakthrough patented formula that contains naturally-occurring Vitamin C metabolites and is quickly absorbed. Its unique manufacturing process neutralizes pH making it gentle on the digestive system. Ester-C along with Citrus Bioflavonoids delivers advanced antioxidant protection remaining active in the immune system for up to 24 hours. Disclaimer: These statements have not been evaluated by the FDA. These products are not intended to diagnose treat cure or prevent any disease.