GNC recently launched its new pre-workout formula, AMP Tri-Phase, which is positioned for mental stimulation, muscle energetics, and long-lasting workout performance, and is available in cherry limeade, lemonade, and lemon lime varieties.
 
The product joins GNC’s best-selling line of AMP products, which includes protein powders and shakes, along with other supplements.
 
The new formula contains multiple specialty ingredients designed to improve nitric oxide production, including Nutrition21’s bonded arginine silicate ingredient Nitrosigine, and Fitnox, a combination herbal formula containing horseradish, pomegranate, and ginger extracts. It also contains Carnosyn-branded Beta-Alanine, Con-CR3T-branded creatine, L-Taurine, PeakATP-branded adenosine 5-triphosphate disodium, fast-acting caffeine anhydrous, sustained-release Xtenergy P2 coffee bean extract, and methylliberine.
 
 Like all of GNC’s products in the AMP line, AMP Tri-Phase is tested for over 285 banned substances.