Lean Xtreme from Designer Supplements:

7-OH (7-alpha-hydroxy-dehydroepiandrosterone), the active ingredient in Lean Extreme, is a supplement which will help you keep the muscle gains and the fatloss that you earn through the proper and disciplined combination of weight training, nutrition, rest, and cardiovascular exercise. Without the use of 7-OH your progress will be measurably slower than it needs to be.