A recent study published in the  https://www.bmj.com/content/381/bmj-2023-075230" rel="nofollow - British Medical Journal , looked at a large sample of older adults ages 60 to 84. Participants were divided into two groups – one was given a placebo, while the other was given a vitamin D supplement of 60,000 IU a month (which averages out to about 2,000 IU a day) for up to five years. At the end of the study, data was analyzed from over 16,800 participants who were still taking the tablets.

During the trial, there were about 1,336 major cardiovascular events (i.e. heart attack, stroke and procedures to treat coronary artery disease). But compared with the placebo group, the rate of major heart problems was slightly lower in the vitamin D group, especially for those who were already taking heart medicines like statins at the beginning of the study.