What is vitamin D on a supplement label?

Vitamin D is a fat-soluble vitamin listed on many supplement labels, often as vitamin D3 (cholecalciferol) or D2 (ergocalciferol) and measured in micrograms or IU. Public-health bodies such as the NIH Office of Dietary Supplements publish reference information about the nutrient class.

Is this page medical advice?

No. Speak with a qualified professional about your own situation.

Where can I read independent references about vitamin D?

This page links to the NIH Office of Dietary Supplements consumer fact sheet and a PubMed literature index, along with FDA and USP resources that describe supplement quality context.

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Vitamin D

Vitamin D is a fat-soluble vitamin shoppers often see on supplement labels. This ingredient topic gathers independent research references and quality-context links, then routes you to exclusive picks through low-key country buttons.

Also known as: vitamin D3 · cholecalciferol · 維他命D · 膽鈣化醇

Use this page for ingredient-class context before you open a product cluster. It is a knowledge page about the nutrient category, not a product endorsement.

What the label shows

On labels, vitamin D is usually listed as vitamin D3 (cholecalciferol) or D2 (ergocalciferol), measured in micrograms or international units (IU). Independent public-health references describe the role vitamin D plays in the body and the intake reference values agencies publish. Research has examined vitamin D across many contexts; the sources below summarise what studies and official fact sheets describe, without making any claim about a specific product.

Research & certification references

These independent sources describe vitamin D as a nutrient class in general, not this specific product, and do not prove this product is intended for any medical purpose.

Reference locale (EN): U.S. NIH, FDA, and PubMed sources only. We do not mix locales on a single page.

Independent research

NIH ODS — vitamin D consumer fact sheet · NIH Office of Dietary Supplements
PubMed — vitamin D supplementation literature · NIH / NLM

Quality & certification context

FDA — dietary supplements consumer information · U.S. FDA
USP — dietary supplement quality standards · U.S. Pharmacopeia

Exclusive picks listing vitamin D

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Supplement note: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Not medical advice.