There are natural things you can take that bump up testosterone.
Longjack.
Fenugreek.
Turmeric.
Gingko Biloba.
Ginger.
Horny Goat Weed.
Tribulus terrestris.
Vitamin D.
Zinc.
Fenugreek is a good one, I’ve been a fan for several years. Watch your blood sugar with it though, take it after meals. Only real downside, and it’s not major, is that there is a sort of maple syrup scent in your sweat if you take enough of it for a long enough time. Me, I like maple syrup so no problem.