I have tried every supplement there is in health, longevity, biohacking, gym, nootropics. You name it. But the best for me is semen retention, always when I do this practice I never get sick, full of energy, more focus, strong, smart, aware. Right now I'm almost a year without taking any supplements, not even coffee, no stimulants at all. I'm almost a year streak of semen retention, sometimes I feel tempted to buy a supplement to strengthen the immune system or to study more efficiently but I purposefully don't do it so I become more resolute in my semen retention journey. I know that if I fap or ejaculate there is not a pill or special food to repair the damage. All I have is my semen retention. You can't buy that.