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Vitamin C

Also called: Ascorbic acid, ascorbate

A water-soluble antioxidant the body needs to make collagen, support immune cells, and absorb iron from plant foods. The body can't make it, so it must come from food.

Supplements can interact with medications and aren't right for everyone, especially during pregnancy or breastfeeding, or with a chronic condition. Ask your provider before you start.

Studied for

  • Immune support
  • Collagen, skin, and wound healing
  • Better iron absorption
  • Antioxidant support

Found naturally in

  • Bell peppers
  • Citrus fruits
  • Kiwi
  • Strawberries
  • Broccoli
What variations of vitamin C exist?Our top pick, what to skip, and how to read the label

Label red flags

  • Chewables, gummies, or drink powders with added sugar
  • Large servings that cause loose stools or gas, a sign the amount is more than your gut can absorb

Check with a provider

  • History of kidney stones, especially oxalate stones
  • Hemochromatosis or other iron overload, since vitamin C increases iron absorption
  • Kidney disease
  • G6PD deficiency, especially before high-dose or IV vitamin C
  • In cancer treatment. Check with your oncology team first.

Supplements that contain it

13 products in Dr. Lesher's dispensary list vitamin c on the label.

Check with your provider before taking any of these, especially if you're pregnant or take medications.

Parts of the body it affects

Explore what each area does and the conditions that can affect it.

Illustration of blood cells: red blood cells, four kinds of white blood cell, and platelets

Blood & immune system

Blood carries oxygen and nutrients, and white blood cells defend you from infection. In autoimmune disease, that defense system targets your own tissues.

Cross-section of skin showing the epidermis, dermis and fat layer, with hair follicles, sweat and oil glands, nerves, and blood vessels

Skin

Your skin is your largest organ and a major immune barrier. Rashes, patches, and color changes are often the first visible signs of an autoimmune condition.

Illustration of an adrenal gland sitting on top of a kidney

Adrenal glands

These small glands on top of your kidneys make cortisol, aldosterone, and adrenaline, which manage energy, blood pressure, and your stress response.

Illustrations: Servier Medical Art, CC BY 4.0

Dr. Lesher, ND

Ready to find the root cause?

Dr. Lesher is a Naturopathic Doctor who focuses on autoimmune and chronic conditions in women. Since 2020, she's helped hundreds of patients stop managing symptoms and start healing.

Book a consult now