GNC AMP Creatine HCl 189
- Pro Performance Creatine Monohydrate - 5000 MG - 50 Servings Creatine has become one of the most popular sports supplements among professional and amateur athletes. In the body, creatine is converted to creatine phosphate, which helps to fuel skeletal muscles and provides support for immediate energy production during high-intensity workouts. Over the past several years, numerous studies have shown that creatine supplementation may help to improve athletic performance. GNC Pro Performance.