Ecological Formulas Vitamin C-1000 Non-Corn is a dietary supplement for immune support. Vitamin C is one of the most powerful supporters of the immune system available. The body is unable to produce vitamin C so it must be obtained from diet or supplementation. Adequate levels of vitamin C support the healthy function of the immune system as well as supporting proper cardiovascular system function. This is a highly purified source of ascorbic acid that is comparable to reagent grade vitamin C. Recommended usage: Take one to three capsules daily or as directed by a physician.