Additionally, glutamine contributes to the intermediary metabolism [19] in the synthesis of amino sugars and proteins [20,21,22], promotes insulin secretion from pancreatic beta cells, and is the precursor of key molecules such as the excitatory neurotransmitter glutamate, the inhibitory neurotransmitter -aminobutyrate (GABA), and the antioxidant glutathione (GSH) [1, 23, 24], considered a powerful marker of the cellular redox potential [25, 26]
It binds to both GIP and GLP-1 receptors, which are G-protein-coupled receptors expressed in pancreatic beta cells, the gastrointestinal tract, adipose tissue, and the central nervous system
Since it is highly present in animal products, vegetarians and vegans have to be most concerned with the nutrition of B12
One of the most significant interactions is with anticoagulant and antiplatelet drugs, such as warfarin and aspirin