Research Notes

Independent testing, a batch-specific certificate, the right form and proper storage: a practical checklist for telling a serious research-peptide supplier from the rest.

What a peptide's certificate of analysis actually shows, how to read the HPLC chromatogram and the mass spectrum, and which details separate a real document from a decorative one.

How one molecule acts on two incretin receptors, what the SURPASS and SURMOUNT trial programmes found, and where tirzepatide sits between semaglutide and retatrutide.

How one molecule engages the GLP-1, GIP and glucagon receptors, how its clinical programme is designed, and why it remains an investigational compound.

A wide preclinical literature, scarce human data — what we actually know about BPC-157: mechanisms, pharmacokinetics, toxicology, and the limits of the evidence.

TB-500 is not thymosin β4 — what we know about the seven-amino-acid fragment, actin biology, and why data on the full protein does not transfer automatically.

A peptide encoded by mitochondrial DNA — what the research shows about AMPK, insulin sensitivity, exercise and ageing.

Why Melanotan I (afamelanotide) has a real clinical history, how it differs from Melanotan II, and what is actually proven about pigmentation.

Mitochondria, sirtuins, DNA repair and ageing — what is actually established about NAD+, and where the human data stand.

Why tesamorelin acts on visceral rather than subcutaneous fat, what the clinical trials show, and why it is not a weight-loss drug.

STEP 1, SELECT and the heart-failure data — what has actually been demonstrated for semaglutide, and why “research peptide” products are not the approved medicine.

A GHRH analogue with unusual pharmacokinetics — what the DAC modification does, what the clinical data shows for GH and IGF-1, and which claims remain unproven.

A melanocortin agonist with a real clinical programme — Phase 3 data in HSDD, studies in men, the side effects, and the critical view of the effect size.

Why ipamorelin is considered more selective than older GHRP molecules, what the human data shows, and which popular claims outrun the evidence.

“Peptide” does not automatically mean safe. Mechanisms, quality, storage — and what regulators have actually documented.

Definition, structure, production and applications of peptides — and what purity, COAs and the research-use-only label actually mean.

From BPC-157 and TB-500 to insulin and GLP-1 — thirteen widely discussed peptides, what drives their popularity, and how to read the science around them.

GLP-1, semaglutide, tirzepatide and retatrutide — how incretin signalling works and what separates approved medicines from laboratory molecules.

The peptides most discussed in sports physiology, what the research actually shows, and where anti-doping rules draw the line.

CJC-1295, ipamorelin, sermorelin and the GH/IGF-1 axis — what studies of hormonal signalling show, and what they do not prove.

BPC-157, TB-500, GHK-Cu and thymosin alpha-1 — tissue biology, preclinical models, and why laboratory results do not automatically translate to humans.

Four randomised trials, 909 participants, and a set of numbers specific enough to argue with. What the pooled evidence on this GHRH analog shows — and what it costs.

Most peptides are coded in the cell nucleus. MOTS-c is not — it is written in mitochondrial DNA, which is what makes it unusual and why it drew attention in metabolic research.

Why peptides ship as a dry powder, how bacteriostatic water differs from sterile water, and the handling steps that decide whether a vial stays intact.

Both are studied in tissue repair research, but they act on different biology. A look at what separates a gastric pentadecapeptide from a thymosin beta-4 fragment.

The metabolic research peptides differ in how many receptors they engage. What single, dual and triple agonism actually mean at the receptor level.

CJC-1295 and ipamorelin are studied together because they act on the pituitary through separate receptors. What GHRH analogs and ghrelin mimetics each do.

A three-amino-acid sequence that binds copper with unusual affinity, studied in gene expression and dermal research. Why the metal is not incidental.

Temperature, light, moisture and agitation each damage peptides differently. What matters before reconstitution, and what changes afterwards.

The C-terminal fragment of growth hormone, what the preclinical work shows, and why the AOD-9604 data does not belong to it.