Institute of Medicine discourages high levels of vitamin D intake.

After reviewing more than 1,000 studies and consulting numerous nutrition researchers and experts, the Institute of Medicine has concluded that most Americans do not need megadoses of vitamin D or calcium to maintain healthy bones. Furthermore, they stated that there is no strong evidence to support the idea that vitamin D causes many of the health outcomes claimed to be benefits of vitamin D supplementation.

PositiveTip: A balanced, healthy diet, plus adequate sunshine exposure will provide adequate levels of vitamin D.