Do the ingredients found inside a ECA stack and/or other "thermogenic" fat burning supplements shorten the human lifespan?
I'm especially curious about caffeine since that is present in pretty much every fat burning supplement for it's thermogenic effect.
All the stuff inside these supplements makes your heart go faster which is by some said to be bad.
But exercise raises your heartbeat as well and they say excersize increases your lifespan.
So what's the deal? Do coffee etc shorten your life and Cardio exercises increases it? Or do exercise AND supplements both shorten life?
I use a ECA stack that has:
25 mg Sida Cordifolia (leaf) (6% ephedrine alkaloid)
200 mg caffeine anhydrous(USP)
150 mg White Willow (bark)
Edited by Monstamode, 11 March 2010 - 01:11 AM.