Vince
Super Moderator
People who don't have their skin exposed to sunlight often or live a long way from the equator can take vitamin D3 capsules."Vitamin D supplementation of 2000 IU daily to healthy adults altered the expression of 291 genes in the peripheral blood white blood cells, affecting >80 different metabolic processes." Many people take more than 2000 IU vitamin D3 daily but they won't have the same health benefits as someone has from careful sun exposure.
http://ajcn.nutrition.org/content/105/5/1031.full
Sadly - the only interventional research papers didn't treat to a particular level - and used a very small dosage..
http://ajcn.nutrition.org/content/105/5/1031.full
Sadly - the only interventional research papers didn't treat to a particular level - and used a very small dosage..