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Examorelin, HEX
A synthetic hexapeptide growth hormone secretagogue that stimulates GH release by acting on the ghrelin receptor in the pituitary and hypothalamus.
Bisi. G G; Podio. V V; Valetto. M R MR; Broglio. F F; Bertuccio. G G; Aimaretti. G G; Pelosi. E E; D...
Hexarelin, a growth‑hormone‑releasing peptide, didn’t raise GH levels in men lacking the hormone, but it did give a quick, short‑lived boost to the heart’s pumping ability in both GH‑deficient and normal volunteers, without changing blood pressure or stress hormones.
Micic. D D; Popovic. V V; Kendereski. A A; Peino. R R; Dieguez. C C; Casanueva. F F FF
The study shows that giving a growth‑hormone‑releasing hormone (GHRH) shot and then, 2 hours later, a tiny dose of the peptide hexarelin, reliably triggers two separate spikes of growth hormone in healthy people. If you flip the order, the second hormone doesn’t work as well. This tells us hexarelin is a strong, repeatable GH releaser, but the test is meant for doctors to check pituitary function, not a DIY performance hack.
Maghnie. M M; Spica-Russotto. V V; Cappa. M M; Autelli. M M; Tinelli. C C; Civolani. P P; Deghenghi....
Hexarelin can boost growth hormone (GH) when given by IV, but its effect depends on having an intact pituitary stalk. In kids with a partially missing stalk, it raised GH almost as well as a standard GH‑releasing hormone, while those with a completely absent stalk showed almost no response. This means the peptide’s GH‑releasing power isn’t universal—it needs the brain‑pituitary connection to work.
Xu. Xiangbin X; Pang. Jinjiang J; Yin. Hongchao H; Li. Meixiu M; Hao. Wei W; Chen. Chen C; Cao. Ji-M...
In a lab study using heart cells from newborn rats, the synthetic peptide hexarelin was shown to slow down the cells that cause scar tissue in the heart and cut down the production of collagen, a key component of that scar tissue. It does this by lowering a growth factor called TGF‑beta and working through specific receptors, but the work was done only in cell dishes, not in people.
Halmos. Gabor G; Schally. Andrew V AV; Comaru-Schally. Ana Maria AM; Nagy. Attila A; Irimpen. Anand...
The study looked at whether certain cancer‑targeting drugs that are linked to a peptide similar to hexarelin would stick to the heart’s growth‑hormone secretagogue receptors. They found none of the tested drugs bound to the heart tissue, meaning they probably won’t add extra heart risk. This doesn’t change how you use hexarelin itself, but it reassures that related peptide‑drug combos aren’t likely to harm the heart.
Arvat. E E; Gianotti. L L; Broglio. F F; Maccagno. B B; Bertagna. A A; Deghenghi. R R; Camanni. F F;...
Hexarelin can cause a big jump in growth hormone in young women, but the boost is much smaller in women after menopause and in older women, and giving estrogen doesn’t fix this drop.
Rigamonti. A E AE; Müller. E E EE
The study shows that gamma‑hydroxybutyric acid (GHB) and the GABA‑B drug baclofen do not increase growth hormone (GH) levels in rats or dogs, even at high doses, and short‑term GHB use doesn’t cause harmful GH changes. Hexarelin still triggers GH release and isn’t affected by GHB.
Cappa. M M; Raguso. G G; Palmiotto. T T; Faedda. A A; Gurreri. F F; Neri. G G; Deghenghi. R R; Loche...
In kids with Prader‑Willi syndrome, a single high dose of the GH‑releasing peptide hexarelin only raised growth hormone levels as much as a standard GHRH test, and both were lower than the response seen in obese children without the syndrome. This suggests that hexarelin’s ability to boost GH is limited in this severe deficiency condition.
Ong. H H; Bodart. V V; McNicoll. N N; Lamontagne. D D; Bouchard. J F JF
Scientists made a special version of hexarelin that sticks to its receptors and used it to show that the peptide binds to a specific protein in both the pituitary gland and heart muscle, suggesting there are different receptor types in these tissues.
Deghenghi. R R; Papotti. M M; Ghigo. E E; Muccioli. G G
The study shows that cortistatin, a brain peptide similar to somatostatin, can attach to the same receptors that ghrelin and synthetic compounds like hexarelin use, while regular somatostatin fragments cannot. This suggests cortistatin might naturally influence growth hormone pathways, but the research is still early and done in lab tissue, not in people.
Broglio. F F; Benso. A A; Valetto. M R MR; Gottero. C C; Quaranta. L L; Podio. V V; Arvat. E E; Bobb...
Giving a single IV dose of the peptide hexarelin briefly improved heart pumping ability in healthy people and those lacking growth hormone, without changing blood pressure or heart rate, but it didn’t help people with severe heart failure.
Rahim. A A; O'Neill. P A PA; Shalet. S M SM
A 16‑week study of twice‑daily hexarelin shots showed that the body’s GH surge gets smaller over time, but overall IGF‑1 levels, muscle, fat, and bone density stay about the same. After stopping the drug, the GH response comes back to normal.
Grottoli. S S; Razzore. P P; Arvat. E E; Oleandri. S E SE; Rossetto. R R; Ciccarelli. E E; Camanni....
The study shows that people with high prolactin levels have a weaker growth‑hormone response to the peptide hexarelin and to pure GHRH, but they respond normally when arginine is added, which blocks a hormone (somatostatin) that normally suppresses GH. This suggests that high prolactin or somatostatin activity can blunt hexarelin’s effect, and that adding arginine can restore GH release.
Maheshwari. H G HG; Rahim. A A; Shalet. S M SM; Baumann. G G
In people who lack a working growth‑hormone‑releasing‑hormone (GHRH) receptor, the peptide hexarelin does NOT trigger a growth‑hormone surge, even though it still raises prolactin, ACTH and cortisol. This shows that hexarelin needs a functional GHRH system to boost GH.
Svensson. J J; Lall. S S; Dickson. S L SL; Bengtsson. B A BA; Rømer. J J; Ahnfelt-Rønne. I...
The study shows that growth hormone (GH) and its secretagogues, like hexarelin, can boost bone growth in children with growth issues and increase bone mineral content in rodents, but there’s no solid proof they improve bone mass in healthy adults yet.
Cassoni. P P; Papotti. M M; Catapano. F F; Ghè. C C; Deghenghi. R R; Ghigo. E E; Muccioli. G G
The study shows that hexarelin and similar growth‑hormone‑releasing peptides stick to receptors in normal thyroid tissue and in some thyroid cancers, and at those same low‑dose levels they can slow down the growth of thyroid cancer cells in a dish. This doesn’t tell us they boost health or longevity in normal people, but it does suggest they interact with the thyroid and might have anti‑cancer effects in specific thyroid tumors.
Deghenghi. Romano R; Broglio. Fabio F; Papotti. Mauro M; Muccioli. Giampiero G; Ghigo. Ezio E
The paper talks about ghrelin and man‑made compounds that stick to the same receptor, which can boost growth hormone, affect hunger, gut function, heart health, and even slow cell growth. Researchers are looking for natural and synthetic molecules that can turn the receptor on or off, which could help with things like appetite control, obesity, or growth‑hormone deficiency. One oral compound called EP1572 and a natural peptide called cortistatin are being studied, but no concrete dosing or usage advice is given yet.
Arvat. E E; Giordano. R R; Ramunni. J J; Arnaldi. G G; Colao. A A; Deghenghi. R R; Lombardi. G G; Ma...
Hexarelin, a growth‑hormone‑releasing peptide, causes a big jump in ACTH and cortisol in Cushing’s patients with small pituitary tumors, but only a small rise in those with larger tumors or healthy people. This shows the drug can strongly activate the stress‑hormone system in certain disease states.
Rigamonti. A E AE; Cella. S G SG; Marazzi. N N; Müller. E E EE
In dogs, giving an NO‑donor drug together with the GH‑releasing peptide hexarelin made the hormone spike much bigger, and blocking NO or prostaglandins changed that effect, especially in older animals. The results hint that NO pathways can boost hexarelin’s action, but the study is in dogs and the age‑related differences are unclear for people.
Arvat. E E; Di Vito. L L; Ramunni. J J; Gianotti. L L; Giordano. R R; Deghenghi. R R; Camanni. F F;...
The study shows that tiny IV doses of the peptide hexarelin trigger growth hormone (GH) release in a dose‑dependent way, and that the cholinergic drug pyridostigmine can boost the GH response, but only when paired with the very lowest hexarelin dose. Both low‑dose hexarelin and pyridostigmine similarly enhance the GH spike caused by a separate hormone (GHRH). However, the work involved only six healthy young men, used IV injections, and combined a drug (pyridostigmine) that has its own side‑effects, so the findings are of limited direct use for most DIY biohackers.