Vitamin D2 vs D3: Differences and Which Is Better?

If you’ve ever looked at vitamin D supplements, you’ve probably noticed that some contain vitamin D2 and others D3. They are both forms of vitamin D, but they are not quite the same. Both can raise vitamin D levels and help prevent or correct deficiency, although research shows that D3 generally does a better job of raising and maintaining vitamin D levels in the blood. So which one should you choose? In this guide, I’ll explain the main differences between vitamin D2 and D3 and when those differences actually matter. Vitamin D2 vs D3 at a glance Here’s the quick version of how vitamin D2 and D3 compare: Vitamin D2Vitamin D3Scientific nameErgocalciferolCholecalciferolMain sourcesFungi, UV-exposed mushrooms and some fortified foodsSunlight, animal foods and supplements; vegan D3 can be made from lichenRaises vitamin D levels?YesYesWhich raises levels better?Works, but generally less effectivelyUsually more effectiveAbsorption from the gutWell absorbedWell absorbedIs it the active form?NoNoCan it be vegan?YesYes, if D3 is made from lichen Both forms are well absorbed and both can improve vitamin D levels. The main difference is that D3 generally raises vitamin D levels more and helps...