Dr. Michael Holick has pioneered our understanding of how we make Vitamin D from the sun, and how it promotes our health. http://drholick.com/
Dr. Anthony Norman of UC Riverside maintains an informative website about Vitamin D. https://vitamind.ucr.edu/
Some useful books include:
- The Vitamin D Solution by Michael Holick [bookshop][amazon]
- Correcting the Vitamin D Deficiency Epidemic; Strategies to Fight Diseases and Prolong Life for Black People by Emily Allison-Francis [bookshop][amazon]
- The Optimal Dose; Restore Your Health with the Power of Vitamin D by Judson Somerville [bookshop][amazon]