Apparently all astronauts from all countries take Vitamin D
Some astronauts also take
Magnesium, Vitamin K for bones (in addition to Vitamin D)
Vitamin B-12, Folate for vision ( in addition to vitamin D )
See also VitaminDWiki
Other than NASA
- Military and Vitamin D - many studies
- Olympic Committee consensus on Vitamin D, Omega-3, Zinc, etc– May 2018
- Olympics committee finally approved vitamin D (Vit D and UV has been used in Olympics since the 1940s)
- Lack of Vitamin D Can Sideline College Football Players – Jan 2018
- NHL discovers Vitamin D – their ideal is 40-120 ng – 2016
- Elite Athletes Try a New Training Tactic: More Vitamin D - WSJ Jan 2016
- 1 tiny pill every two weeks fights all of the following
Diabetes + Heart Failure + Chronic Pain + Depression + Autism + Breast Cancer + Colon Cancer + Prostate Cancer + BPH (prostate) + Preeclampsia + Premature Birth + Falls + Cognitive Decline + Respiratory Tract Infection + Influenza + Tuberculosis + Chronic Obstructive Pulmonary Disease + Lupus + Inflammatory Bowel Syndrome + Urinary Tract Infection + Poor Sleep + Growing Pain + Multiple Sclerosis + PMS + Schizophrenia + Endometriosis + Smoking 27 problems
Note: Once a week also fights: COVID, Headaches, Colds, Fibromyalgia, Asthma, Hives, Colitis etc.