What Taking Vitamin C Every Day Does to Your Body By Leah Groth of ETNT Health | What Taking Vitamin C Every Day Does to Your Body Vitamin C, aka L-ascorbic acid, is naturally present in some foods, added to others, and also available as a dietary supplement, explains the National Institutes of Health—but do you know what taking vitamin C every day does to your body? According to Darren Mareiniss, MD, FACEP, Emergency Medicine Physician at Einstein Medical Center in Philadelphia, the vitamin is essential to every diet—and knowing what taking vitamin C every day does to your body is important. "Vitamin C is naturally present in many foods and is not synthesized by the body," he explains to