June 2, 2017
5.0 out of 5 stars Excellent boog written for lay man.By Richard K. Marcott Dpm on February 27, 2016
Format: Kindle Edition|Verified Purchase
Well researched book with substantial bibliography to verify the claims made. Very informative and clerified many false ideas about Vit D3. I began taking 50000 iu daily and in 30 days saw major changes in skin, sinus allergies, and increased stamina. And in general feel much stronger and healthier.