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Its a 15-amino acid fragment of a peptide that is found in gastric juices in the stomach
PMID: 40756949 McGuire FP, et al
doi: 10.1002/ijc.11387 211 HuangBWarnerMGustafssonJA
Bottom line: Glutamine acts as a metabolic trigger and fuel source that helps the body build and maintain protein-based structures like the gut lining and collagen matrix
Studies suggest this rebalancing occurs through effects on thymic peptide signaling and restoration of neuroendocrine-immune system communication that deteriorates with aging
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