How does vitamin C help the immune system?

Vitamin C helps white blood cells work, protects them from oxidative damage, and strengthens the skin’s barrier against germs. It also helps you absorb iron from plant foods.

How much is enough

Most adults need 75–90 mg a day — one orange or a cup of bell peppers covers it. Megadoses are excreted, not stored, and can upset the stomach.

Smokers and people with certain conditions need more. Our team can help you choose a form and dose that fits your regimen.