is caffeine the best energy ingredient in diet pills?

[char]

I want energy from my diet pills. Is caffeine the best ingredient for that? Looks like there are a lot of choices.

[bonniekins]

I think it is. It's definitely the one that has had the most study and people have used it for hundreds/thousands of years, so we usually know what to expect from it in ourselves.

[legendarytroy]

I would say yes, if only because you likely already know that its' safe for you because you've had coffee and tea in your lifetime or at least chocolate. And we all know it works.