Evidence-led profiles covering mechanisms, research stages, limitations and unresolved questions for individual peptides and related research compounds.
A plain-English guide to semaglutide, longer-lasting GLP-1 signalling, laboratory and human evidence, and where research findings do not transfer.
Semaglutide Explained: GLP-1 Signalling and What the Evidence Really Tests Read More »
A plain-English guide to tesamorelin, GHRH signalling, the human evidence, regulatory limits and the boundaries of what current research can establish.
Tesamorelin Explained: GHRH Signalling, Human Trials and Regulatory Limits Read More »
Evidence reviewed: 7 August 2026Author: ExtolX Editorial Team This is an educational overview of published research, not medical advice. Retatrutide, also known as LY3437943, is an experimental peptide developed by Eli Lilly. It has attracted attention because one molecule is designed to activate three hormone-receptor systems connected with appetite, blood sugar and the way the
Retatrutide Explained: How Triple-Receptor Research Works Read More »
Evidence reviewed: 7 August 2026Author: ExtolX Editorial Team This is an educational overview of published research, not medical advice. BPC-157 is a synthetic 15-amino-acid research peptide. Most evidence comes from cells, tissues and animal injury models, while published human research remains small, exploratory and unable to establish a medical benefit. The short version BPC-157 is
BPC-157 Explained: What Preclinical Research Does and Does Not Show Read More »
Evidence reviewed: 7 August 2026Author: ExtolX Editorial Team This is an educational overview of published research, not medical advice. TB-500 and thymosin beta-4 are related names, but they do not describe the same molecule. Full-length thymosin beta-4 contains 43 amino acids; material characterised as TB-500 is a synthetic seven-amino-acid fragment. Evidence must be matched to
TB-500 Explained: How It Differs from Thymosin Beta-4 Read More »
Evidence reviewed: 7 August 2026Author: ExtolX Editorial Team This is an educational overview of published research, not medical advice. GHK-Cu is a small peptide joined to copper. Researchers have mainly studied it in cells and tissues, particularly in relation to collagen and the supporting material around cells. Human evidence is limited and applies only to
GHK-Cu Explained: Copper Binding, Cell Signalling and Current Evidence Read More »
Evidence reviewed: 21 August 2026Author: ExtolX Editorial Team This is an educational overview of published research, not medical advice. MOTS-c is a short peptide linked to mitochondrial genetic material. Cell and animal studies connect it with metabolic stress responses, but human research is mostly observational. Natural MOTS-c measurements in people do not show what externally
MOTS-c: A Mitochondrial-Derived Peptide in Metabolic Research Read More »
Evidence reviewed: 21 August 2026Author: ExtolX Editorial Team This is an educational overview of published research, not medical advice. Semax is a laboratory-made peptide based on a small part of the natural hormone ACTH. Researchers have studied it in cells, animals and some regional clinical settings, but the accessible human evidence is much narrower than
Semax: ACTH-Derived Peptide Research and Evidence Gaps Read More »
Evidence reviewed: 21 August 2026Author: ExtolX Editorial Team This is an educational overview of published research, not medical advice. Selank is a laboratory-made peptide derived from tuftsin, a natural immune-system peptide. Most published work examines signalling and behaviour in laboratory or animal models; the available human research is too limited to support broad claims about
Selank: Tuftsin-Derived Peptide Research and Human Evidence Read More »
PT-141 is the development name associated with bremelanotide, but approval applies to a specific finished medicine—not every material sharing the peptide name.
PT-141 Explained: Bremelanotide Research and the Limits of Product Equivalence Read More »