Outside of this forum, very few people online talk about using vitamin D by applying it on the skin, and just going through some posts on here it seems some people tried and failed at it.
I was wondering if anyone can confirm by blood test they raised their levels using transdermal application only, and if so what ratio of absorption did you use? 10% like ray says or more/less?
I was wondering if anyone can confirm by blood test they raised their levels using transdermal application only, and if so what ratio of absorption did you use? 10% like ray says or more/less?