Vitamin C is an essential nutrient, meaning that it needs to be consumed from the diet because the body is not able to produce it. Vitamin C is an antioxidant, it boosts the immune system, and it aids in collagen, carnitine, tyrosine, and several neurotransmitters synthesis. Vitamin C’s role in the synthesis of collagen is crucial for the formation of cartilage, scar tissue, and blood vessels. The Recommended Daily Allowance (RDA) for adult males is 90 mg per day and 75 mg per day for adult females. Vitamin C is prominent in many foods. To learn what foods are high in vitamin C visit our Vitamin C: Best of page.