College football injuries 5.9 X more likely if low pre-season vitamin D – thesis
* Lack of Vitamin D Can Sideline College Football Players – Jan 2018
* NHL discovers Vitamin D – their ideal is 40-120 ng – 2016
* 4X fewer stress fractures in college athletes if more than 40 ng of vitamin D – Feb 2016
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1. Overview Sports and vitamin D has the following summary
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