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Vitamin D3

Most useful when sun exposure is low, blood levels are low, or a clinician recommends maintenance supplementation.

Form

Lichen-derived cholecalciferol for vegan D3

Dose

Common maintenance range is 1,000-2,000 IU daily, adjusted to blood levels and clinician advice.

When to take

Take with a meal that contains fat to improve absorption.

Last reviewed

2026-06-17

Toxicity and cautions

Toxicity is rare but possible with chronic very high doses; excess can raise blood calcium dangerously.

Quality checks

Use 25-hydroxyvitamin D blood tests to personalize dosing, especially with limited sun exposure or known deficiency.

Popular brands

Sports Research Vegan D3
MaryRuth's
Vitashine
NOW Foods
Doctor's Best Vegan D3

Related guide: read the full nutrition guide.

General information only

GreenFit provides general nutrition information only. It is not medical advice. For medical conditions, pregnancy, children, elderly people, eating disorders, kidney disease, diabetes, or medication-related concerns, consult a qualified doctor or registered dietitian.