Vitamin D deficiency may impair muscle function in older adults, study finds - UPI.com
https://www.upi.com/Health_News/2021/04/16/vitamin-d-deficiency-muscle-function-study/2701618587167/
Vitamin D deficiency may increase risk for addiction to opioids and ultraviolet rays
https://www.massgeneral.org/news/press-release/Vitamin-D-deficiency-may-increase-risk-for-addiction-to-opioids-and-ultraviolet-rays
Vitamin D deficiency may increase risk for addiction to opioids and ultraviolet rays | EurekAlert! Science News
https://www.eurekalert.org/pub_releases/2021-06/mgh-vdd060821.php