Hexarelin

ID: hexarelin

Aliases: HEXARELIN ACETATE, hexarelin acetate

Type: compound

Route/form: injection in human physiology studies; no approved wellness route

Status: research

Evidence level: early human

Best data tier: human physiology

Support scope: human, review/regulatory

Source types: human_physiology, review

Linked sources: 5

Broad outcomes: Cardiovascular / lipids / blood pressure, Fat loss / metabolic health, Hormones / fertility / sexual health, Muscle growth / performance / recovery, PEDs / AAS / thermogenics

Reading note: These are curation notes anchored to linked sources, not a clinical recommendation or protocol.

Targets / mechanism

• ghrelin receptor / GHSR agonism
• growth hormone release
• cardiac/GH secretagogue receptor hypotheses

Optimization domains

• growth hormone
• endocrine
• cardiometabolic
• muscle

Research basis

• Human dose-response and modulation studies show hexarelin is a potent GH secretagogue with responses shaped by GHRH, somatostatin, age, and metabolic state.
• It is a useful mechanistic comparator because it may produce broader ACTH/cortisol/prolactin signals than a cleaner GH-only narrative.
• Best supported claim is GH-secretagogue physiology.

Limits, risks, and missing evidence

• No strong human evidence supports informal hypertrophy, recovery, or fat-loss outcomes from hexarelin itself.
• Age/metabolic-state response variability makes simple extrapolation weak.
• Cortisol/prolactin, desensitization, glucose, edema, and anti-doping concerns matter.

Risk flags

• investigational
• endocrine axis
• gh igf1 axis
• cortisol prolactin signal
• limited outcome data

Linked papers, labels, and reviews

1. Growth hormone-releasing activity of hexarelin in humans: a dose-response study
   human_physiology / pubmed_hexarelin_human_dose_response_1994
   Human GH response dose-ranging for hexarelin.
2. Age-related growth hormone-releasing activity of growth hormone secretagogues in humans
   human_physiology / pubmed_hexarelin_age_response_1997
   Human GH secretagogue response by age; relevant to extrapolation limits.
3. The safety and efficacy of growth hormone secretagogues
   review / pubmed_gh_secretagogues_safety_2018
   Clinical review covering GH secretagogues and risk context.
4. Modulation of growth hormone-releasing activity of hexarelin in man
   human_physiology / pubmed_hexarelin_modulation_1995
   Human volunteer physiology study mapping hexarelin interaction with GHRH and somatostatin tone.
5. Metabolic modulation of the growth hormone-releasing activity of hexarelin in man
   human_physiology / pubmed_hexarelin_metabolic_modulation_1995
   Human physiology paper showing nutritional/metabolic state can alter hexarelin GH response.