The most abundant amino acid in the body. Great as part of a gut support protocol and provides cells which line the gastrointestinal tract with a source of energy. It is conditionally essential for providing energy during stressful time, after illness or if you have an active lifestyle. Discover Glutamine Capsules, for extra support during trying times. While Glutamine may be known as a non-essential amino acid, during times of stress or illness, it is crucial. It's one of the most abundant amino acids in the body. Ideal for those who exercise regularly or are recovering from illness, these easy-to-swallow capsules are also suitable for vegetarians and vegans.