Ephedrine 24/25 mg
Caffeine 200 mg
One aspirin 325 mg (some use 80 mg)
Source: Musclemag Encyclopedia of Bodybuilding page 683
Ephedrine is banned in pre-workout and fat loss supplements. The only source I know of is in over the counter asthma medications.
Fatburners like BPI's Roxylean attempt to get the same results as the old ECA stack.
Another option would be to take Synephrine extracted from Bitter Orange as a substitute for the E portion of the stack. People with underlying heart conditions, high blood pressure or any other health concerns should avoid this stack like the plague.
Detoxes are just another scam. http://t.co/UCAti623Zj @Examinecom #scam #detox
— Tavis Piattoly,MS,RD (@TavisPiattoly) January 22, 2015