Description Description Helps supply the brain with energy. Supports cellular growth, energy and repair. Also supports the immune system and digestion. Provides 500 mg l-glutamine per capsule. How It Works L-glutamine is an amino acid (a protein building block) that is important in supplying the brain with energy. Its main function is to support cellular growth, energy and repair. It also helps with muscle pain (from exercise). Recommended Use Take 1–2 capsules daily with a meal. Ingredients L-glutamine. View AllClose