Peptide Press — BriefingExploring the science shaping the future of human biology — peptides, longevity, performance, and human potential.https://peptide.press/en-usRetatrutide: why a triple receptor agonist is drawing so much attentionhttps://peptide.press/articles/retatrutide-triple-agonist/https://peptide.press/articles/retatrutide-triple-agonist/By engaging three metabolic receptors at once — GLP-1, GIP, and glucagon — retatrutide represents a genuinely new idea in metabolic pharmacology. Here is what triple agonism means, and what the human data shows so far.Mon, 13 Jul 2026 00:00:00 GMTpeptidesRetatrutideGLP-1GIPGlucagonClinical TrialsMetabolismWhy mitochondrial decline matters in aginghttps://peptide.press/articles/why-mitochondrial-decline-matters-in-aging/https://peptide.press/articles/why-mitochondrial-decline-matters-in-aging/Mitochondria do far more than make energy — and their gradual dysfunction sits close to the center of why bodies age. A guide to the biology that has made mitochondria one of the most important targets in longevity research.Mon, 13 Jul 2026 00:00:00 GMTlongevityMitochondriaAgingHealthspanMitophagyMetabolismGrowth hormone secretagogues explained: how ipamorelin, CJC-1295, and related compounds differhttps://peptide.press/articles/growth-hormone-secretagogues-explained/https://peptide.press/articles/growth-hormone-secretagogues-explained/They are often mentioned in one breath, but the peptides that raise growth hormone work through genuinely different mechanisms — and the differences matter. A guide to the growth hormone axis and the molecules that act on it.Sun, 12 Jul 2026 00:00:00 GMTperformanceIpamorelinCJC-1295Growth HormoneGHRHGhrelinRecoveryExplainerThe programmable body: how gene editing, cell therapy, and synthetic biology are changing what medicine can attempthttps://peptide.press/articles/the-programmable-body/https://peptide.press/articles/the-programmable-body/For most of its history, medicine has managed disease from the outside. A cluster of technologies now lets us edit, engineer, and reprogram biology directly — moving from treating symptoms toward rewriting the systems beneath them.Sun, 12 Jul 2026 00:00:00 GMThuman-potentialGene EditingCell TherapySynthetic BiologyRegenerative MedicineFuture MedicineHow to read a peptide Certificate of Analysishttps://peptide.press/articles/how-to-read-a-peptide-certificate-of-analysis/https://peptide.press/articles/how-to-read-a-peptide-certificate-of-analysis/Identity, purity, potency, net content — what each line on a COA actually proves, walked through on a real third-party report. A practical guide to reading testing documentation with confidence.Sat, 11 Jul 2026 00:00:00 GMTpeptidesTestingAnalysisCOAQuality ControlWhy statistically significant does not always mean clinically importanthttps://peptide.press/articles/statistical-significance-clinical-importance/https://peptide.press/articles/statistical-significance-clinical-importance/A result can be statistically significant and still barely matter — or matter enormously and just miss significance. Learning to tell the difference is one of the most useful skills for reading research well.Sat, 11 Jul 2026 00:00:00 GMTresearchStatisticsClinical ResearchEvidenceStudy DesignGHK-Cu: a copper-binding peptide with a half-century of research behind ithttps://peptide.press/articles/ghk-cu-wound-biology-to-skin/https://peptide.press/articles/ghk-cu-wound-biology-to-skin/A naturally occurring copper-binding peptide that researchers have studied for fifty years — and whose biology spans an unusually broad range of processes in skin and tissue repair.Fri, 10 Jul 2026 00:00:00 GMTpeptidesGHK-CuCopper PeptidesSkin BiologyResearchMOTS-c and the mitochondrial signals behind exercise and metabolismhttps://peptide.press/articles/mots-c-mitochondrial-signaling/https://peptide.press/articles/mots-c-mitochondrial-signaling/A tiny peptide encoded inside the mitochondria may help explain how our cells adapt to exercise and metabolic stress — and it is opening a fascinating window into the biology of aging.Thu, 09 Jul 2026 00:00:00 GMTlongevityMOTS-cMitochondriaMetabolismResearchBPC-157: what decades of preclinical research have revealed — and what human studies have yet to answerhttps://peptide.press/articles/bpc-157-limited-human-evidence/https://peptide.press/articles/bpc-157-limited-human-evidence/A peptide with an unusually broad preclinical literature and a remarkable breadth of healing signals across tissues — and a human research chapter that is just beginning.Wed, 08 Jul 2026 00:00:00 GMTpeptidesBPC-157Preclinical ResearchEvidence ReviewUnderstanding purity, potency, and net content: three measurements every peptide researcher should knowhttps://peptide.press/articles/why-a-99-percent-purity-result-can-mislead/https://peptide.press/articles/why-a-99-percent-purity-result-can-mislead/Three different numbers describe what is in a vial, and each answers a different question. Knowing what each one means makes you fluent in the language of a Certificate of Analysis.Wed, 08 Jul 2026 00:00:00 GMTpeptidesTestingQuality ControlAnalysisTesamorelin: one of the rare peptides with extensive human clinical evidencehttps://peptide.press/articles/tesamorelin-body-composition-trials/https://peptide.press/articles/tesamorelin-body-composition-trials/A growth-hormone-releasing peptide backed by large randomized trials and an FDA approval — a look at what a fully developed body of human peptide evidence can look like.Tue, 07 Jul 2026 00:00:00 GMTperformanceTesamorelinClinical TrialsBody CompositionCan biology be optimized? The emerging science of human potentialhttps://peptide.press/articles/can-biology-be-optimized/https://peptide.press/articles/can-biology-be-optimized/Biology is entering an era in which molecules, computation, and engineering are converging to answer questions that once belonged to science fiction. A look at where the real frontier is.Mon, 06 Jul 2026 00:00:00 GMThuman-potentialEnhancementFuture MedicineAnalysisFrom laboratory discovery to human trials: why translating peptide research takes timehttps://peptide.press/articles/why-mouse-results-fail-to-translate/https://peptide.press/articles/why-mouse-results-fail-to-translate/The path from a promising finding in the lab to a proven human therapy is long by design. Understanding why makes you a sharper — and more patient — reader of early science.Sun, 05 Jul 2026 00:00:00 GMTresearchPreclinicalAnalysisTranslationWhat the March 2026 FDA warning letters reveal about the limits of "research use only"https://peptide.press/articles/march-2026-fda-peptide-warning-letters/https://peptide.press/articles/march-2026-fda-peptide-warning-letters/In a single day, the FDA told multiple peptide sellers that an RUO label does not control when the surrounding evidence establishes an intended human-drug use. The reasoning is worth reading closely.Thu, 02 Jul 2026 00:00:00 GMTresearchRegulationEnforcementFDARUOHow to check a compound's clinical trial status yourselfhttps://peptide.press/articles/reading-clinicaltrials-gov-status/https://peptide.press/articles/reading-clinicaltrials-gov-status/ClinicalTrials.gov is public, free, and one of the fastest ways to see where a compound actually stands in human research. Here's how to read a record.Sun, 28 Jun 2026 00:00:00 GMTresearchClinical TrialsExplainer