Vitamin C vs Vitamin A

Evidence-based comparison of Vitamin C and Vitamin A — absorption, dosage, safety, and which is best for your needs.

Reviewed by: Supplement Hub Editorial Team · Category: Vitamin · Updated:

Vitamin C

Neuroprotection: Protects neurons from oxidative and excitotoxic damage; HPA axis modulation: Modulates hypothalamic–p

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Vitamin A

Immune modulation: Regulates innate and adaptive immune responses

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Detailed Comparison

Vitamin CVitamin A
CategoryVitaminVitamin
MechanismNeuroprotection: Protects neurons from oxidative and excitotoxic damage; HPA axis modulation: Modulates hypothalamic–pImmune modulation: Regulates innate and adaptive immune responses
SafetyTaking too much vitamin C can cause diarrhea , nausea , and stomach cramps. In people with a condition called hemochromatosis , which causes the body Yes, high intakes of some forms of vitamin A can be harmful. Getting too much preformed vitamin A (usually from supplements or certain medicines) can

Which Should You Choose?

Vitamin C may be better if: Vitamin C is an essential antioxidant that supports immune function and collagen synthesis. Most people can get adequate vitamin C from fruits and vegetables.

Vitamin A may be better if: Immune modulation: Regulates innate and adaptive immune responses