Originally Posted by carnivore

Total testosterone is meaningless. Free testosterone is what matters. For example, my total testosterone is slightly below average for my age, but my free testosterone is off the charts high. Free testosterone is affected by SHBG (the lower the SBHG the higher the free testosterone) and an abundance of "good" estrogen (good estrogen competes with testosterone to bind to SHBG therefore less bound testosterone means more free testosterone).

Masturbation has very little effect on testosterone if you lift weights and eat well. Vitamin D, Zinc, and DIM are some natural supplements that increase testosterone.

That's as much as I understand.