Hexarelin

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By The Health Stacks Research TeamUpdated September 20, 2026

Hexarelin is a man-made peptide made in a lab. Hexarelin's main job is to turn on a switch on pituitary cells. Hexarelin also tends to raise other body chemicals, like prolactin and a stress hormone called cortisol, which can muddy results and may cause side effects.

Hexarelin is a synthetic hexapeptide growth hormone releasing peptide (GHRP) and ghrelin-receptor (GHSR-1a) agonist that potently stimulates pituitary GH release. It also exerts direct cardioprotective effects via cardiac receptor subtypes (including CD36) that are independent of GH. It is not FDA-approved.

Research-stageEarly-stage — evidence so far is mostly cell, animal, or preliminary human studies. Not an approved medicine. Verified confidence80–100 — backed by strong, well-corroborated sources (peer-reviewed research, clinical guidelines). Our highest confidence tier.

Benefits

What Hexarelin Helps With

The benefits people report — backed by research.

Weight management (6)

Reduction in cumulative food intake 90/100Rated 90/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Weight management 90/100Rated 90/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Reduction in fat mass 90/100Rated 90/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Modulates ghrelin concentrations 85/100Rated 85/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Modulates leptin concentrations 85/100Rated 85/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Persistent stimulation of food intake 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →

Glycemic & metabolic (5)

Modulates blood glucose levels 85/100Rated 85/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Insulin sensitivity 85/100Rated 85/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Affects C-peptide levels 85/100Rated 85/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Influences GLP-1 levels 85/100Rated 85/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Improved Glucose Tolerance 85/100Rated 85/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →

Energy & mitochondrial (2)

Alters Respiratory Exchange Ratio 95/100Rated 95/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Antagonizes chemotherapy-induced mitochondrial dysfunction 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →

Musculoskeletal (2)

Increased Pulsatile GH Secretion 85/100Rated 85/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Muscle recovery 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →

More reported benefits (4)

Hexarelin provides potent acute GH stimulation 80/100Rated 80/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Modifies Total Locomotor Activity 95/100Rated 95/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Restores redox homeostasis by reducing ROS production 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →Stimulation of growth hormone secretion 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →

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Safety

Known Side Effects

Adverse effects reported in the research and by community use.

  • Hexarelin: partial and reversible attenuation of GH response with chronic useMild 60/100Rated 60/100Source typeSpecialist communityIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ excelmale.com

Reported in research and community sources — not exhaustive. Discontinue use and consult a healthcare professional if side effects occur.

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Technical Details (sequence & mechanism — click to expand)

Mechanism of Action

Hexarelin is a synthetic hexapeptide growth hormone releasing peptide (GHRP) and ghrelin-receptor (GHSR-1a) agonist that potently stimulates pituitary GH release. It also exerts direct cardioprotective effects via cardiac receptor subtypes (including CD36) that are independent of GH. It is not FDA-approved.

Evidence

Research Citations (4)

Every claim above traces back to a source you can check — here are 4 of them.

  • Effects of GHRP-2 and hexarelin, two synthetic GH-releasing peptides, on GH, prolactin, ACTH and cortisol levels in man. Comparison with the effects of GHRH, TRH and hCRH.

    ClinicalStudy1997 80/100Rated 80/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology →
    Source

  • Comparison of the effects of growth hormone-releasing hormone and hexarelin, a novel growth hormone-releasing peptide-6 analog, on growth hormone secretion in humans with or without glucocorticoid excess.

    95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology →
    Source

  • Rapid desensitisation of the GH secretagogue (ghrelin) receptor to hexarelin in vitro

    95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology →
    Source

  • Mechanism of action of hexarelin and GHRP-6: analysis of the involvement of GHRH and somatostatin in the rat

    95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology →
    Source

Timeline

History & Milestones

Key moments in Hexarelin’s research and regulatory timeline — sourced and dated.

  1. Effects of GHRP-2 and hexarelin on GH, prolactin, ACTH and cortisolPublicationJan 1, 1997
    Related:Hexarelin
    80/100Rated 80/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ source

News

Latest on Hexarelin

Dated, sourced reporting that mentions Hexarelin.

Regulatory

Revive Rx LLC dba Revive Rx Pharmacy (Houston, TX) 483 issued 02/07/2025

FDA's Dallas district office inspected Revive Rx LLC (Houston, TX) between January 27 and February 7, 2025 and issued a Form 483 citing sterile-failure observations — products exposed to sub-ISO 5 air and microbial contamination (mold and spore-forming bacteria) in production areas. The 483's product list includes Hexarelin 6 mg per Vial for Injection among the drugs the compounding pharmacy produced, alongside sermorelin and tesamorelin. The document is inspectional observations, not a final agency determination.

90/100Rated 90/100Source typeRegulator or clinical registryIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology →Read →
Regulatory

Darmerica, LLC

FDA warned API supplier Darmerica, LLC (Davie, FL) after a March 2025 inspection found CGMP failures that render its drug APIs adulterated, plus misbranding violations including distribution of APIs ineligible for 503A compounding. The letter specifically cites the firm's drug listing for Hexarelin Acetate (NDC 71052-621), which reported an incorrect active peptide ingredient. It ties the misbranding to products distributed for compounding use.

90/100Rated 90/100Source typeRegulator or clinical registryIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology →Read →

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