Vitamin D vs Vitamin C

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

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

Vitamin D

BDNF upregulation: Increases brain-derived neurotrophic factor for neuroplasticity; Anti-inflammatory: Reduces inflammat

Full Guide

Vitamin C

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

Full Guide

Detailed Comparison

Vitamin DVitamin C
CategoryVitaminVitamin
MechanismBDNF upregulation: Increases brain-derived neurotrophic factor for neuroplasticity; Anti-inflammatory: Reduces inflammatNeuroprotection: Protects neurons from oxidative and excitotoxic damage; HPA axis modulation: Modulates hypothalamic–p
SafetyYes, getting too much vitamin D can be harmful. Very high levels of vitamin D in your blood (greater than 375 nmol/L or 150 ng/mL) can cause nausea , Taking too much vitamin C can cause diarrhea , nausea , and stomach cramps. In people with a condition called hemochromatosis , which causes the body

Which Should You Choose?

Vitamin D may be better if: Vitamin D is essential for bone health and calcium absorption. Many people need supplements to meet their vitamin D requirements.

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.