Hexarelin Guide & Tableau de Dose

What is Hexarelin?

Hexarelin is a synthetic six-amino-acid peptide — a growth hormone secretagogue (GHS), meaning it prompts the body to release growth hormone (GH). Think of it as a key designed to fit a very specific lock in the brain and heart called the GHS receptor (GHSR). It was modeled after ghrelin, the so-called "hunger hormone," but researchers built hexarelin to be chemically sturdier and more potent than its natural cousin.^[2] Because it is a research-use-only compound, it is studied in laboratory and animal settings — it is not approved for human use or as a medical treatment.

How Hexarelin Works

Picture the pituitary gland — a pea-sized gland at the base of your brain — as a sleeping security guard. Hexarelin rings the doorbell (binds to GHSR), waking the guard up to release GH into the bloodstream.^[2] But hexarelin doesn't stop there. Receptors for GHS are also found on the heart and blood vessels, which means hexarelin can act directly on cardiovascular tissue — completely separate from its GH-releasing role.^[2] Researchers also discovered a second receptor called CD36, found specifically on heart cells, that hexarelin can activate to produce protective cardiac effects.^[2] It also influences a fat-regulating protein called PPAR-γ, which plays a role in how the body handles insulin and lipids.^[5]

What the Research Shows

Heart and Cardiovascular Health

A large portion of hexarelin research focuses on the heart. Studies suggest hexarelin may protect cardiac cells from several types of stress. In lab cell studies, hexarelin shielded heart muscle cells (H9C2 cells) from angiotensin II — a molecule that causes the heart to enlarge abnormally, a condition called cardiac hypertrophy. Hexarelin did this by boosting a cell-cleanup process called autophagy and dialing down a growth-promoting protein pathway called mTOR.^[4] Research has also explored hexarelin's potential role in conditions involving diabetes-related heart disease, noting its GH-independent cardiovascular activity and its ability to regulate insulin sensitivity.^[5]

Abdominal Aortic Aneurysm (AAA)

An abdominal aortic aneurysm is a dangerous ballooning of the main artery in the abdomen. In a mouse model, hexarelin reduced the expansion of the aorta and helped preserve the elastic fibers holding it together. It worked partly by keeping smooth muscle cells in their normal, stable state and by dampening inflammation through a key inflammatory pathway called NF-κB.^[3]

Kidney Protection

One of the more recent research areas is acute kidney injury (AKI) caused by ischemia/reperfusion — when blood supply is cut off and then restored, causing a wave of damage. In rat models, hexarelin pretreatment reduced the death of kidney cells (apoptosis), lowered markers of kidney damage like serum creatinine, and improved the appearance of kidney tissue under a microscope. Researchers traced the mechanism to hexarelin binding to a protein called MDM2, which in turn kept the cell-death protein p53 in check.^[1] See the dosage chart on this page for the specific protocol used in that study.

Lung Injury

In a mouse model of acute respiratory distress syndrome (ARDS) — a severe form of lung injury — hexarelin improved lung flexibility (compliance), reduced immune cell flooding into the lungs, and at the two-week mark, lessened the scarring (fibrosis) left behind after injury. Both pre-treatment and post-injury dosing showed benefits.^[6]

What Hexarelin Is Being Studied For

• Growth hormone release — its original and most studied role as a GHS^[2]
• Cardiac protection — against hypertrophy, ischemia, and general heart stress^[4]
• Vascular conditions — including abdominal aortic aneurysm^[3]
• Acute kidney injury — via anti-apoptotic mechanisms^[1]
• Acute lung injury / ARDS — inflammation and fibrosis reduction^[6]
• Diabetes-related complications — including diabetic cardiomyopathy and metabolic regulation^[5]

How Hexarelin Is Dosed in Research

Dosing in preclinical studies varies widely depending on the research question and the animal model used. For example, kidney injury studies have used one protocol while long-term GH-release studies in dogs have used another — all the specifics are laid out in the dosage chart on this page. If you want to explore the math behind weight-based dosing conversions, the calculator on this site can help. Remember: these are research reference figures only, not recommendations for human use.

Mixing and Storing Hexarelin

Hexarelin typically arrives as a dry, white powder (lyophilized). To use it in a research setting, it needs to be reconstituted — dissolved in a liquid. Bacteriostatic water (sterile water with a small amount of benzyl alcohol to prevent microbial growth) is the most common choice. Add the liquid slowly down the side of the vial and gently swirl — never shake vigorously, as this can break down the peptide structure. Once mixed, store the vial in a refrigerator (around 2–8 °C / 36–46 °F) and use within a few weeks. Unmixed, lyophilized powder can generally be kept frozen for longer-term storage. Always label vials with the date of reconstitution and keep them away from light and heat.

Sources

1. Hexarelin alleviates apoptosis on ischemic acute kidney injury via MDM2/p53 pathway. — European journal of medical research, 2023. PMID 37710348.
2. The cardiovascular action of hexarelin. — Journal of geriatric cardiology : JGC, 2014. PMID 25278975.
3. Hexarelin attenuates abdominal aortic aneurysm formation by inhibiting SMC phenotype switch and inflammasome activation. — Microvascular research, 2022. PMID 34856183.
4. Hexarelin protects cardiac H9C2 cells from angiotensin II-induced hypertrophy via the regulation of autophagy. — Die Pharmazie, 2019. PMID 31526442.
5. Implications of ghrelin and hexarelin in diabetes and diabetes-associated heart diseases. — Endocrine, 2015. PMID 25645463.
6. Hexarelin modulates lung mechanics, inflammation, and fibrosis in acute lung injury. — Drug target insights, 2021. PMID 34871336.