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Optimum Nutrition Threshold Muscle Fatigue Fighter Fruit Fusion -- 1600 mg - 9.24 oz

  During exercise and especially high-intensity training glucose and glycogen are broken down for energy. In the process hydrogen ions (H+) are also produced within the muscles. H+ accumulation causes the muscles to become more acidic and ultimately leads to fatigue. Packed with Beta-Alanine Histidine and Phosphates Threshold is designed to help boost your intramuscular buffering system so that you can train harder longer. 1.6 grams of Beta Alanine. 550 mg of L-Histidine. 4 Mineral Electrolytes. Supports Carnosine Synthesis
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