It's always controversial the benefiths of the high intakes of vitamins and minerals. But one thing is true: low levels of them, like vitamin C can lead a low testosterone levels as well febleness and astenia. I am not talking here of scurvy, but a low intake that itself low the reserve levels of the vitamin. As well as many other effects: antioxidant and cofactor enzyme, it also control to some extent the spermatogenesis and near this effect also the testosternone levels, so do you want to get the max of your natural testosternone levels? So take al least 80-140 mg of vitamin C!