First off the honest answer, I don't.

But I will give you a couple of links to people that seem to know what they are talking about because they have information that has helped me in other areas. So I think they are at least worth listening to.

https://www.youtube.com/results?search_query=dr+ken+berry+low+testosterone

https://www.youtube.com/results?search_query=eonutrition+testosterone