That's true, but the effect will not be obvious. After promoting testicles, the body's metabolism will increase and hormones will also increase. Faster metabolism will make you consume more. If you eat as much as before, if you consume more than you consume, you will lose weight. If your hormones increase, it is easier to synthesize with exercise muscles. But the effect of promoting testicles is very low. Only proper exercise, adequate rest and reasonable diet can shape and lose weight.