This potent form of vitamin C works synergistically with bioflavonoids in order to optimise your immune system.This formula is designed to provide extra support during stressful times, as stress can inhibit your immune response. Vitamin C-400 is also an effective antioxidant, and useful for combating free radical damage caused by oxidative stress. This non-acidic form of vitamin C is gentle on your stomach and contains less than one tenth the acidity of similar supplements. Inspired by real food, Innate designs their supplements so that they are as close to nature as can be, so your body is better able to recognise and absorb them effectively.