It's interesting that multi-vitamins sometimes have D2 instead of D3. What does that mean? Vitamin D2 is from plants, it's ergocalciferol. It comes from plants that are irradiated by sunlight ...

Vitamin D2 doses are equivalent to the same dosage amount of vitamin D3 ... of vitamin D is up to 600 IU daily for adults.

and there have only been a few clinical trials of vitamin D2 to prevent bone fractures in adults. Vitamin D3 is more effective at raising and maintaining the vitamin D blood test (again ...

We also need vitamin D to support various other functions and systems in the body. But if you’ve been shopping the supplement aisle, you must have noticed that there isn’t just one form of vitamin D: ...

A recent study published in the American Journal of Preventive Cardiology found that higher vitamin D doses do not improve heart health in older adults with low vitamin D levels. The research ...

The recommended dosage for vitamins D2 and D3 supplements varies based on ... Infants 0–12 months: 400 IU (10 mcg) Children ...

The most common vitamin D compounds are vitamin D2 and vitamin D3 ... adding that a daily maintenance dose should be about 600 IU. This is particularly important for people "who are most at ...