Glutamic acid

Glutamic acid (glutamate) is a non-essential amino acid functioning as the principal excitatory neurotransmitter and a hub of amino-acid metabolism, transamination, and the synthesis of glutamine and glutathione. Salivary glutamate reflects amino-acid flux and nitrogen handling that shift with muscular work and recovery. Wenzel et al. (2026) measured salivary glutamic acid among the metabolites that reliably track recent exercise within a multi-omics strain score.