Conditionally Essential Amino Acid for High-Intensity Exercise and Recovery. Perform. Recover. Recharge. No Artificial Flavors, Colors, or Sweeteners. Research points to glutamine levels being depleted during high-intensity exercise, with the need to be replenished to maximize muscle glycogen and improve immune system function. This is why glutamine is appropriately classified as a conditionally essential amino acid. The immune system support of glutamine is often overlooked, but high-intensity exercise depresses the immune system, and frequent high-intensity exercise can prevent gains in strength and muscle. Over-training occurs when your body does not have ample time to recover. Increasing the use of an amino acid designed to improve recovery time will maximize progress toward your training goals. Some of the potential benefits of Glutamine supplementation include: Spare muscle glutamine stores and reduce muscle protein catabolism. Stimulate glucose synthesis to promote recovery from exercise. Promote enhanced recovery from training. Support arginine and nitric oxide (NO) levels. May improve the H+ (acid)- and ammonia-buffering capacity of the body. May improve thermogenesis and metabolic rate. Support blood glucose and energy level.