vitamin d

https://www.sciencedaily.com/releases/2011/09/110929144639.htm People taking oral steroids are twice as likely as the general population to have severe vitamin D deficiency, according to a study of more than 31,000 children and adults by scientists at Albert Einstein College of Medicine of...

https://www.livestrong.com/article/171215-tanning-beds-and-vitamin-d/ Tanning Beds and Vitamin D KATIE REGAN The use and safety of tanning beds has been hotly debated for years, with strong opinions on both sides. The use of tanning beds to increase vitamin D is an even more controversial...