Although the authors were criticized for not providing rigorous measurements demonstrating
bone loss, the
patients were originally referred to them for osteoporosis, and when their vitamin D supplements were discontinued, their
bone mineral
density improved, suggesting that the toxic level of vitamin D was contributing to
bone loss.
It has also been shown to help protect against cancer, reduce symptoms of hepatitis, increase
bone mineral
density,
improve immune function in HIV
patients and increase lifespan in mice (44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54).