Participants were divided into two groups: one received a placebo, while the other received a vitamin D supplement of 60,000 IU per month (which averages about 2,000 IU per day) for up to five years.

Participants took vitamin D supplements for a year at doses of either 600 IU/day or 3750 IU/day. The results indicated that supplementation helped lower their blood pressure. Our study found ...

When Mayo Clinic researchers began studying vitamin D's effects on older adults' blood pressure, they didn't anticipate the ...