@Dappre
I have tried A LOT of ECA stacks, and have found them good and bad for different reasons…
Firstly, here in the UK, they are essentially restricted / illegal / banned for sale here and therefore I have to buy them from overseas - so that’s the first issue!
They are pretty good for exercise (mostly the ephedrine and caffeine) but poor quality brands can make you feel very jittery, sweaty and a bit anxious. I would say 50% of the ones I’ve used I gave up on after a few weeks because of this.
Also, ephedrine has a half life, so as you’re using it, it’s potency gets less and less as time goes on, so whilst you may experience better fat burning, reduced appetite, a good mental buzz and more energy, this will wear off after 1-2 weeks, and you’ll need to up the dose.
Regular breaks on/off ephedrine/ECA are usually advocated by people who use them.
Definitely not a magic bullet, but pretty useful if you’re exercising. Not sure about fasting, I think you’d get very jittery, and the % increase of fat burning would be very moderate.
All they are doing is very slightly increasing the body temperature and thermogenic response and caffeine is pretty much the main ingredient doing this. Be careful what you buy, send me links if you want and I’ll have a look.