Vitamins & Minerals
Vitamin D3 vs Vitamin D2: What Does the Label Mean?
Quick Answer
Vitamin D3 is cholecalciferol. Vitamin D2 is ergocalciferol. Both are forms of vitamin D used in foods and supplements. The label should identify the form and amount.
By Everyday Solutions Exchange Editorial · Published Sep 2026 · Updated Sep 2026Reviewed by Everyday Solutions Exchange Editorial
Vitamin D3 is cholecalciferol. Vitamin D2 is ergocalciferol. Both are forms of vitamin D used in foods and supplements. The label should identify the form and amount.
Two forms of vitamin D
D3 and D2 have different chemical sources and are labeled separately. A supplement name such as vitamin D does not always tell you the source form.
Read the amount
Check micrograms and International Units when both appear. Compare the serving size before comparing products.
Food and supplement context
Vitamin D also comes from fortified foods and sunlight-driven skin synthesis. Supplement use belongs in the larger picture of diet, sun exposure, and medical guidance.
Why ESX links this topic
MPG lists Vitamin D3 in Core Immunity and in other broad nutrition formulas. This page explains the label term without treating one finished product as a medical recommendation.
Related Product Guides
- Core Immunity
- 125 Drive
Sources & References
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