3DN Yohimbine HCL is the purest standardized form of extract from the ancient Pausinystalia yohimbine tree in central Africa. Yohimbine is whats known as Alpha-2-Adrenergic Antagonist. Yohimbine inhibits receptors that blunt fat burning and increases Adrenalin promoting increased metabolic rate & energy expenditure. Yohimbine has shown to hep aid in targeting stubborn body fat due to its properties to increase circulation to stubborn areas.