Dymatize Nutrition's Dyma-Burn Xtreme is a thermogenic fat burner with a well-formulated proprietary blend of nutrients and botanicals that all support fat loss directly or indirectly. Dyma-Burn Xtreme's formula shows the influence of a lot of other weight loss products and approaches, and has most of the things we'd look for in a fat burner. Dyma-Burn Xtreme includes yohimbe extract and the premium absorption enhancing nutrient Bioperine, like Nutrex' Lipo-6X . The caffeine alkaloids and white willow bark extract in Dyma-Burn are reminiscent of the very successful ephedra-caffeine-aspirin or ECA stack that was popular when ephedra was more widely used. Speaking of ephedra, you'd be wise to wonder what "Ephedrina" is, since most products go out of their way to point out that they're ephedra-free. Ephedrina, actually has no ephedra, instead it looks like it's a proprietary combination of clary sage and green tea extracts. Does it have the same effects as ephedra? No, but like the old-ephedra based products, provided you really are doing your best to exercise and eat right, Dyma-Burn Xtreme is going to maximize your results by optimizing your metabolism for fat-burning.