GHRP-6
A synthetic growth hormone secretagogue known for potent GH release and significant appetite stimulation through ghrelin receptor activation.
Always consult a qualified clinician
This information is for educational purposes. Peptide therapy should be guided by a licensed healthcare provider. Connect with a Noho clinician
What is GHRP-6?
GHRP-6 is one of the earliest synthetic growth hormone releasing peptides developed. It acts on the ghrelin receptor to stimulate growth hormone release from the pituitary gland. It is notable for its strong appetite-stimulating effects, which can be beneficial for those needing to increase caloric intake but may be undesirable for others.
Why People Talk About It
Growth hormone release
ModerateAppetite stimulation
StrongGastric motility improvement
EmergingBody composition changes
EmergingHow It Works
GHRP-6 mimics the hunger hormone ghrelin, telling your brain to release growth hormone and increase appetite. It creates a strong growth hormone pulse but also significantly increases the desire to eat.
Common Questions
Safety Information
Common Side Effects
Cautions
- • Strong appetite stimulation may be problematic
- • Elevates cortisol more than other GHRPs
- • Not FDA-approved
- • Monitor blood sugar levels
What We Don't Know
Long-term metabolic effects of chronic ghrelin receptor activation are not fully understood.
Published Research
35 studiesInsulinotropic action of bombesin-like peptides mediated by gastrin-releasing peptide receptors in steers
Bombesin-like peptides stimulate growth hormone secretion mediated by the gastrin-releasing peptide receptor in cattle
Ghrelin-attenuated cognitive dysfunction in streptozotocin-induced diabetic rats
Adrenocorticotrophic hormone (ACTH) responsiveness to ghrelin increases after 6 months of ketoconazole use in patients with Cushing's disease: comparison with GH-releasing peptide-6 (GHRP-6)
Effects of ghrelin, growth hormone-releasing peptide-6, and growth hormone-releasing hormone on growth hormone, adrenocorticotropic hormone, and cortisol release in type 1 diabetes mellitus
Decreased ghrelin-induced GH release in thyrotoxicosis: comparison with GH-releasing peptide-6 (GHRP-6) and GHRH
GHRP-6 is able to stimulate cortisol and ACTH release in patients with Cushing's disease: comparison with DDAVP
Effects of growth hormone-releasing peptides in healthy dogs and in dogs with pituitary-dependent hyperadrenocorticism
Effects of fasting and pegvisomant on the GH-releasing hormone and GH-releasing peptide-6 stimulated growth hormone secretion
Acute dexamethasone administration enhances GH responsiveness to GH releasing peptide-6 (GHRP-6) in man
Tyr-Ala-Hexarelin, a synthetic octapeptide, possesses the same endocrine activities of Hexarelin and GHRP-2 in humans
Growth hormone (GH) response to GH-releasing peptide-6 and GH-releasing hormone in normal-weight and overweight patients with non-insulin-dependent diabetes mellitus
Growth hormone (GH)-releasing peptide-6 requires endogenous hypothalamic GH-releasing hormone for maximal GH stimulation
Different effects of growth hormone releasing peptide (GHRP-6) and GH-releasing hormone on GH release in endogenous and exogenous hypercortisolism
Growth hormone responses to GH-releasing peptide (GHRP-6) in hypothyroidism
Influence of endogenous cholinergic tone and growth hormone-releasing peptide-6 on exercise induced growth hormone release
Hexarelin, a synthetic growth hormone releasing peptide, stimulates prolactin secretion in acromegalic but not in hyperprolactinaemic patients
Growth hormone secretion after the administration of GHRP-6 or GHRH combined with GHRP-6 does not decline in late adulthood
Growth hormone-releasing peptide-6 stimulates sleep, growth hormone, ACTH and cortisol release in normal man
The effect of an opiate antagonist on the hormonal changes induced by hexarelin
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
Role of epidermal growth factor and growth hormone-releasing peptide-6 in acceleration of renal tissue repair after kanamycin overdosing in rats
Pharmacokinetic study of Growth Hormone-Releasing Peptide 6 (GHRP-6) in nine male healthy volunteers
Effects of ghrelin, GH-releasing peptide-6 (GHRP-6) and GHRH on GH, ACTH and cortisol release in hyperthyroidism before and after treatment
Diagnosis of adrenal insufficiency using the GHRP-6 Test: comparison with the insulin tolerance test in patients with hypothalamic-pituitary-adrenal disease
Ghrelin and GHRP-6-induced ACTH and cortisol release in thyrotoxicosis
Association between tumoral GH-releasing peptide receptor type 1a mRNA expression and in vivo response to GH-releasing peptide-6 in ACTH-dependent Cushing's syndrome patients
Decreased GH secretion and enhanced ACTH and cortisol release after ghrelin administration in Cushing's disease: comparison with GH-releasing peptide-6 (GHRP-6) and GHRH
Growth hormone response to GHRH + GHRP-6 in type 2 diabetes during euglycemic and hyperglycemic clamp
Hexarelin decreases slow-wave sleep and stimulates the secretion of GH, ACTH, cortisol and prolactin during sleep in healthy volunteers
Growth hormone releasing hexapeptide-6 (GHRP-6) test in the diagnosis of GH-deficiency.
Evaluation of pituitary GH reserve with GHRP-6.
Growth hormone-releasing peptide 6 (GHRP-6) hydrogel for acute kidney injury therapy via metabolic regulation.
[D-Lys3]-GHRP-6 exhibits pro-autophagic effects on skeletal muscle.
Growth hormone releasing peptide-6 (GHRP-6) prevents doxorubicin-induced myocardial and extra-myocardial damages by activating prosurvival mechanisms.
Always consult a qualified clinician
This information is for educational purposes. Peptide therapy should be guided by a licensed healthcare provider. Connect with a Noho clinician
Related Peptides
GHR-2 (GHRP-2)
ModerateA synthetic growth hormone secretagogue that stimulates natural GH release, studied for body composition, recovery, and anti-aging.
Ipamorelin
ModerateBeginnerA selective growth hormone secretagogue that stimulates GH release without significantly affecting cortisol or prolactin.
CJC-1295
ModerateBeginnerA growth hormone-releasing hormone analog that stimulates the pituitary gland to produce more growth hormone.
MK-677
ModerateAn orally active growth hormone secretagogue that mimics ghrelin to stimulate GH and IGF-1 release.
Quick Facts
- Class
- Growth Hormone Secretagogue
- Evidence
- Moderate
- Safety
- Moderate Data
- Updated
- Feb 2026
- Citations
- 35PubMed
Also known as
Tags
Related Goals
Evidence Score
Clinical Trials
View Clinical TrialsLinks to ClinicalTrials.gov for reference. Listing does not imply endorsement.
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