Learn what vitamin D does and how to read D3 amounts, supporting ingredients and serving information.
Why vitamin D matters
Vitamin D helps the body absorb calcium and contributes to normal bone health. Food, fortified foods, sunlight exposure and supplements can all be relevant to vitamin D status. A general explanation cannot establish that you are deficient or need a supplement.
D3 is a form, not a complete formula description
Vitamin D3 is also called cholecalciferol. Products can contain D3 alone or combine it with other ingredients. Our Vitamin D3 Complete formula also lists magnesium malate, vitamin K2, lysine, zinc and plant ingredients. Check the whole panel before comparing it with a single-ingredient D3 product.
Understand the units
Vitamin D amounts are expressed in micrograms (mcg) or international units (IU). One mcg equals 40 IU. Our Vitamin D3 Complete panel lists 2,000 IU per capsule, equivalent to 50 mcg. The package lists one capsule per serving and 90 servings.
More is not automatically the right choice
Vitamin D needs differ. Too much supplemental vitamin D can be harmful. Discuss the amount and the full formula with a qualified clinician, particularly if you already take vitamin D or use medicines. Blood testing and its interpretation belong with your healthcare provider.
Explore the formula
See Vitamin D3 Complete ingredients and sizes or compare vitamin D products.
Sources and further reading
General education from Green Organic Supplements, a supplement retailer. This guide is not individual medical advice or a clinical review of our products. Research about an ingredient is not proof of a particular formula’s effects.