For research and educational purposes only. PepTalk discusses what researchers study in laboratory settings — not medical advice. Products are sold for laboratory research use only.
Research Peptide
Ipamorelin
A selective growth-hormone secretagogue — studied for clean GH release without the cortisol or prolactin baggage. Freeze-dried, ultra-pure, ready to reconstitute.
For research and educational purposes only. PepTalk discusses what researchers study in laboratory settings — not medical advice. Products are sold for laboratory research use only.
The short version
Ipamorelin is a tiny five-amino-acid peptide that nudges the pituitary to release the body's own growth hormone. What makes it interesting to researchers is how clean the signal is: in the literature it raises GH while leaving the stress hormones — cortisol, ACTH — and prolactin essentially untouched, which is the opposite of how the earlier growth-hormone peptides behaved.
What researchers are looking at
The body makes its own growth hormone in the pituitary, and it releases it in pulses rather than a steady stream. Ipamorelin is a "secretagogue" — a compound that prompts that release rather than replacing the hormone itself. It works by mimicking ghrelin, the same hunger-and-growth signal the body already uses, and binding to ghrelin's receptor (GHSR-1a) on the hormone-producing cells.
What sets it apart in the research is selectivity. Older growth-hormone peptides tended to spill over and also raise cortisol and prolactin — stress and milk-signaling hormones that complicate any study. Ipamorelin was designed to pull only the growth-hormone lever: in published models it triggers a robust GH pulse with no measurable rise in ACTH, cortisol, or prolactin. Because it works through the body's own pulsing machinery, researchers note it tends to preserve the natural rhythm of release rather than flattening it.
Most of this evidence is preclinical — animal and cell-based studies, including the original work that first characterized it as "the first selective growth hormone secretagogue." The findings are best read as what researchers observe in those models rather than proven human outcomes, but the clean, selective profile is what keeps it a reference point in growth-hormone research.
Ghrelin's receptor engaged
Ipamorelin mimics ghrelin and binds the GHSR-1a receptor on the pituitary's hormone-producing cells, the somatotropes.
The release signal fires
Binding triggers an internal calcium-signaling cascade (via phospholipase C and IP3) that tells the cell to release its stored growth hormone.
A clean GH pulse
Growth hormone is released in a pulse — without the cortisol, ACTH, or prolactin rise seen with earlier secretagogues in the models studied.
Where the evidence stands
an honest mapWell-characterized — selective GH release confirmed in vitro and in animal models
Largely preclinical; limited human data
At a glance
What it is
A GH secretagogue
5 amino acids
Studied for
Growth-hormone release
selective, pulsatile
What it skips
No cortisol/prolactin rise
the "clean" profile
Research stage
Mostly preclinical
animal & cell models
How it arrives
Lyophilized powder
Ships freeze-dried for stability and shelf life. Before research use, it's reconstituted with bacteriostatic water. Once reconstituted, refrigerate at 2–8°C and use within about 21–28 days, per the Certificate of Analysis.
Bacteriostatic water
Needed to reconstitute
Certificate of analysis
Common questions
All products on FastPeps are labeled Research Use Only (RUO), and this is a legal requirement, not just fine print. It means these compounds are sold strictly for scientific research and laboratory purposes, not for personal use, self-administration, or medical treatment. This label exists because these compounds have not completed the FDA approval process to be sold as drugs or supplements. When you purchase from FastPeps, you are agreeing the product is for research purposes only.
For laboratory and research use only. Sold exclusively for in-vitro research and laboratory experimentation. Not a drug, supplement, or article intended for human or veterinary use; nothing here is medical advice or a claim of therapeutic benefit. Statements describe findings from published research.
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