High-Dose Vitamin C (PDQ®): Integrative, alternative, and complementary therapies - Patient Information [NCI]

Vitamin C is a nutrient found in food and dietary supplements. It is an antioxidant and also plays a key role in making collagen (see Question 1). High-dose vitamin C may be taken by mouth or given by an intravenous (IV) infusion (through a vein into the bloodstream). When taken by IV infusion, vitamin C...