I think the clinical evidence for this is… limited, and no doctor is going to recommend a tanning bed or exposure to more sunlight. They should do a hormone pan

I think the clinical evidence for this is… limited, and no doctor is going to recommend a tanning bed or exposure to more sunlight. They should do a hormone panel to see why the T is low - could be an underlying thyroid issue or overproduction of something like aromatase which is converting too much T into estrogen or SHBG which prevents T from being utilized. Treatments like HCG mono therapy to increase upstream hormone production might be used, but usually the easiest, most effective and simplest thing is exogenous injectable testosterone cypionate or test entheanate, injected once or twice weekly.