See [1] or just search for “vitamin D immune suppression”. I very much agree that a healthy person should not do random tests. But when there is a suspicion of

See [1] or just search for “vitamin D immune suppression”. I very much agree that a healthy person should not do random tests. But when there is a suspicion of deficiency, one should investigate thoroughly before taking big doses of a steroid hormone that may suppress immune system otherwise known as “Vitamin D”. [1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4160567/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4160567/