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 and helps the normal function of the digestive tract and immune system, playing a particularly important role when your system is compromised. Ideal for those who exercise regularly or are recovering from illness, these easy-to-swallow capsules are also suitable for vegetarians and vegans.