Yeah, fMRIs are pseudoscientific, as is endocrinological blood work. Right.
Anyway, avoid plastics (especially reheating), avoid tap water without a filter, avoid soy and obviously avoid sugar.
Make sure you eat tuna, brazil nuts, garlic, onions, cabbage, red meat, free-range poultry, oysters, crab, lots of water and excersise frequently.
I have seen otherwise healthy young males having less than 400 serum testosterone, while 20 years ago it was unheard of. You cant really do much about xenoestrogens so you should focus on upping your test and lowering aromatase as much as possible.
Masturbation plays a role in that as well.