sure there is, most of the supplements are boron, zinc and fenugreek and there are studies about all of those. The problem with any herb or vitamin is that there is no incentive to do a lot of clinical studies on them because you cannot really patent them like pharmaceutical drugs.
safe and natural vitamins, minerals and herbs.
There's no research to suggest they actually increase test.
sure there is, most of the supplements are boron, zinc and fenugreek and there are studies about all of those. The problem with any herb or vitamin is that there is no incentive to do a lot of clinical studies on them because you cannot really patent them like pharmaceutical drugs.
That makes sense, and I'm an advocate of supplements regardless (I take them myself everyday).