Vitamin D is widely known for its role in supporting immunity and bone health.New research suggests that taking vitamin D ...
In an Alzheimer's study, people took 2,000 IU for four years and didn't have any adverse effects. In another study, people took 800 IU for six years, with no adverse effects, he says. Pay ...
Those over 70 should aim for an additional 200 IU (5 micrograms) of vitamin D, for a total of 800 IU/day (20 micrograms). Though this is a general guideline, The Endocrine Society does note that ...