Advanced Repair + Recovery Formula 5G L-Glutamine 500mg Sustamine Speed Recovery & Reduce Soreness Glutamine is the most common amino acid found in skeletal muscle. Over 61% of skeletal muscle is Glutamine. Glutamine plays a key role in protein synthesis. Supplementing glutamine can minimize the breakdown of muscle and improve protein metabolism. Sustamine is a dipeptide ingredient that includes both L-glutamine (the most important amino acid for muscle protein synthesis) and L-alanine (an amino acid required for rebuilding glycogen stores in the body). Together, they offer enhanced performance, bioavailability, and stability. Before exercise: Sustamine boosts energy in the form of enhanced glycogen production. During exercise: Sustamine increases stamina by helping to sustain the gradual release of energy, enhancing electrolyte and fluid absorption in the intestine, and inhibiting muscle breakdown. After exercise: Sustamine supports faster recovery, replaces lost water and electrolytes, and helps repair and rebuild muscles.