- NO Vitamin if not near noon, no on a sunny day, not in the summer
- See related in VitaminDWiki
- Most exercise occurs in the evening (when there is little or no Vitamin D) – July 2017
- Sunlight and health - many studies
- Seniors get about 4X less vitamin D from the sun or UVB
- 50 ng of Vitamin D - 100 hours of noon sunbathing OR 3 dollars of Vit D
- Athletic strength improved by Vitamin D – meta-analysis May 2024
- Parkinson’s patients 50X less likely to get even a little sun– meta-analysis Jan 2019
- Indoor athletes have 4.5 ng less Vitamin D (Asia in this case) – meta-analysis April 2023
NO Vitamin if not near noon, no on a sunny day, not in the summer