There are also natural ways to keep your own T level high, like healthy food
Specifics? Evidence?
Specifics? Evidence?
The evidence is strongly suggestive that vitamin D supplementation has an effect on testosterone levels in men.
On a purely anecdotal, personal level, I had my free test checked some years back, before I started vitamin D supplementation. After supplementing with 10,000 IUs a day for around a year, I had it checked again and it was significantly higher (I don't have the numbers now, sorry).
Just asking because I was considering 10 000 IU a week following my MDs advice (which is already higher than what it the normal off the shelf dose: 1000 IU a day).
This doesn't prove that 10,000 is unnecessary, but there's no proof that it's necessary either :) (or is there?)
On the other hand, just recently a Polish study showed 6,000 IU improving rowers metabolism and performance — http://suppversity.blogspot.com/2015/02/6000iuday-of-vitamin...
However, it's unclear if lower dose would lead to similar results or if this is due to any other factors.