Normal sugar already decrease testosterone significantly. Just avoid it; https://www.testofuel.com/tf/does-sugar-lower-testosterone/ Also, having insulin in your body prevent you from burning fat and losing weight. Also, this stimulate "growth" in your body and adult should limit the time their body is in "growth" since it is link to certain types of cancer. So avoid snacks, even non sugary ones. Also, 120 dried leaf of stevia is equivalent to about 50 cups of sugar. 50 cups of sugar to rats, that's bonkers.