Unflavored Power Nitric Oxide Booster Amino Acid Whether your goal is to increase athletic performance, boost metabolism, improve recovery or even build muscle, research shows that L-glutamine can significantly aid your efforts. During an intense workout, your body becomes stressed, and your muscles and tendons require more glutamine than the amount supplied by a normal diet. After an intense workout, the levels of cellular glutamine can drop by 50 percent and plasma levels by 30 percent. This muscle-wasting state is a gateway for the body to use your muscle for energy rather than carbohydrates, but glutamine can help prevent this from happening. Supplementing with L-glutamine allows your muscles to fight and push a bit further. This boosts your strength and helps repair your skeletal muscles. A study found that glutamine supplementation makes it possible to recover quicker from intense weight training sessions because it improves muscle hydration. This aids the muscle recovery process and reduces recovery time for wounds and burns.