Vitamin C contributing to the more severe symptoms of scurvy. More generally, the biochemical role of vitamin C is to act as an antioxidant (a reducing agent) by donating electrons to various enzymatic and non-enzymatic reactions. Doing so converts vitamin C to an oxidized state - either as semidehydroascorbic acid or dehydroascorbic acid. These compounds can be restored to a reduced state by glutathione and NADPH-dependent enzymatic mechanisms. In plants, vitamin C is a substrate for ascorbate peroxidase. This enzyme utilizes ascorbate to neutralize toxic hydrogen peroxide (HO) by converting it to water (HO). Scurvy is a disease resulting from a deficiency
The Vitamin Shoppe 2015 study, led by Dr. Pieter A. Cohen of Harvard, found that three supplements — JetFuel Superburn, JetFuel T-300 and MX-LS7 — sold at Vitamin Shoppe contained BMPEA. In response, Vitamin Shoppe removed these products from shelves because the safety of these supplements were in question and may not comply with F.D.A. regulations. On January 19, 2007, independent laboratory ConsumerLab.com found 32.8 micrograms of lead per daily serving in Vitamin Shoppe's "Especially for Women" multivitamin. 15.3 micrograms is more than ten times the amount of lead permitted without a warning label in California, the only state to regulate lead in