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The mechanism behind these effects is complex and, honestly, still not fully understood four decades after the peptide discovery
You are immediately ready to walk out and dominate your day
Unlike steroid hormones that pass through cell membranes, most peptides interact with G protein-coupled receptors (GPCRs) or receptor tyrosine kinases (RTKs) on the extracellular surface
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Large randomized controlled trials in humans are absent, so clinical efficacy claims lack robust evidence
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