Well I indeed think low Vitamin D level and Androgenetic Alopecia are correlated in a certain way. That would explain high prevalence of male pattern baldness among northern European populations. If you look at Arabic population, middle east, emigrants, they all tend to have thick healthy hair http://s1.ibtimes.com/sites/www.ibt...le_large/public/2015/07/20/syria-refugees.jpg
Of course that might just have with their genes meaning they have DHT resistant scalp hair as every bald man has mostly DHT resistant occipital hair, but I think, who knows, maybe sun exposure is correlated to growth inhibitors/prohibitors in male pattern baldness cycles.
