I haven’t read this thread; but this may (hopefully) help.
Vitamin A Stimulates Testosterone Production
I know some people here are trying to raise testosterone and have even asked Peat about it. Peat responded long the lines of "increase vitamin A and thyroid". It looks like he is right (again) about the vitamin A part. This study shows that both retinol and retinoic acid stimulated testosterone...
raypeatforum.com