Sure, you may be able to work harder initially, but what happens when your sympathetic branch is taxed because of your supplementation usage that has lead you to overwork itself. Perceived effort is one thing, but performance is another.
Unfortunately, we only discuss, and believe in the other side of this conversation. "Use this supplement to ultra enhance your body comp!"
I'm not anti supplement, but I am anti-bull****, and really fed up with outlandish claims and would just like supplement companies, their reps, and nut swinging consumers to just give honest feedback without throwing fake magic fiery dust all over these boards.
Unfortunately, honesty doesn't sell that many supplements.