Longevity
Peptides are short chains of amino acids — smaller and more targeted than full proteins — that occur naturally in the body and act as signaling molecules. In longevity and performance medicine, specific peptides are used to nudge particular biological pathways rather than broadly replacing a hormone.
Sermorelin, one of the more established options, works by stimulating the pituitary gland to produce more of your own growth hormone, rather than introducing synthetic growth hormone directly. This indirect approach is part of why it has a different risk profile than direct hormone replacement.
Common goals patients pursue peptide therapy for include improved sleep quality, faster recovery between workouts, and support for lean muscle mass as growth hormone naturally declines with age. Response varies by individual, and realistic expectations matter — peptides support the body's own processes rather than producing dramatic overnight changes.
Because peptide therapy involves prescription compounded medications, it should always be pursued under physician supervision, with baseline labs and follow-up monitoring built into the plan.