The ephedra extract (ephedrine) in the T6 Fatburner enhances your metabolism and allows you to burn fat more efficiently and much faster than usual. Caffeine boosts your energy as a further stimulant. This will allow you to do a much better job on your next workout. So you also burn fat and calories. Furthermore, ephedra acts as an appetite suppressant. The combination of these ingredients stimulants in the T6 Fatburner T6 Labs Zion ECA Stack is a proven weight loss compound.