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PMID: 32775771

The mechanism appears to involve serotonergic pathway modulation: research reports BPC-157-associated increases in hippocampal serotonin concentrations and 5-HIAA (5-hydroxyindoleacetic acid) turnover, consistent with enhanced serotonergic neurotransmission

As 3+ increased GCLM mRNA stability in addition to GCLM transcription but the mechanism is unclear [87]
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