So far, the only glimmer of hope is a small pilot study of 30 healthy adults that showed that vitamin D3 can be successfully administered via a patch and that vitamin D status improved in all of ...

There are two types of vitamin D supplements available for over-the-counter purchase (vitamin D2 and vitamin D3). Vitamin D3 is the type that most experts believe should be utilized in clinical ...

A research review of 24 studies also found that vitamin D3 is more effective at raising and maintaining vitamin D levels in ...

A 21-year-old man or women exposed to summer UVB light generates 10,000 IU (the equivalent of 250 mcg, 25 multivitamin pills of vitamin D, or 100 glasses of milk) of vitamin D in 15 to 20 minutes.