32. I would say that an extra strength 5 hour energy is comparable, but fat burners also act as an appetite suppressant. You do not feel hungry.
Most are aware of these things already. Have you just discovered these things?
When I was your age, I was tearing it up in the gym 6 days/wk.... no stims necessary.
No amount of caffeine of ephedra containing products will make up for a sub-par diet or lack of will power.
Stims are toxic stuff and should be used sparingly.