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All Comparisons

Hexarelin vs Ipamorelin

Research material comparison: purity standards, available formats, molecular data, batch COA documentation, and regulatory status. For in vitro research use only.

Hexarelin: CIpamorelin: D
AttributeHexarelinIpamorelin
CategoryGrowth Hormone SecretagogueGrowth Hormone Secretagogue
Evidence RatingCPhase I–II Clinical TrialsDPreclinical
Clinical StatusPhase II completed. Development discontinued due to tolerance/desensitization concerns.Research-only / Not approved for human use
MechanismHexarelin binds to and activates the ghrelin/growth hormone secretagogue receptor (GHS-R1a) in the pituitary and hypothalamus through a triple mechanism: direct stimulation of pituitary somatotroph cells to release stored GH, stimulation of hypothalamic GHRH-releasing neurons, and suppression of som...Ipamorelin (sequence: Aib-His-D-2Nal-D-Phe-Lys-NH2) selectively binds to the Growth Hormone Secretagogue Receptor (GHS-R1a) on anterior pituitary somatotroph cells, increasing cAMP and activating protein kinase A to promote pulsatile GH secretion. Its structural specificity means it fits only the GH...
Half-Life~70 minutes~2 hours
BioavailabilityHigh SC bioavailability
Molecular Weight~887 g/mol~711.9 g/mol
WADA StatusProhibitedProhibited
Research Half-Life~70 minutes~2 hours
Key Use Cases
  • Body Composition
  • Anti-Aging
  • Anti-Aging
  • Body Composition
  • Sleep
Safety Concerns
  • Generally well-tolerated in clinical trials
  • Transient cortisol and prolactin elevation at higher doses
  • Hunger increase (ghrelin receptor activation)
  • Widely regarded as the mildest GHS available; minimal side effects in published animal and human studies
  • Common: injection site reactions (redness, swelling, bruising) in 15-30% of users, resolving within 24-48 hours
  • Common: mild temporary "head rush" or flushing immediately after injection due to sudden vasodilation
Contraindications
  • Active cancer (GH/IGF-1 axis stimulation)
  • Pituitary tumors
  • Pregnancy and breastfeeding
  • Diabetic retinopathy (GH may worsen)
  • Active malignancy or personal/family history of cancer (GH promotes cell proliferation)
  • Pregnancy and breastfeeding
  • Pituitary disorders or prior pituitary surgery
  • Diabetes with retinopathy (GH can affect blood glucose and worsen retinopathy)
Regulatory (US)Not FDA-approved. Development discontinued. Research chemical only.Not FDA-approved. Research chemical only. WADA-banned (S2 growth factor).

Research Material Specifications

Catalog specifications for the corresponding research materials, including batch documentation coverage.

SpecificationHexarelinIpamorelin
Purity Standard≥98%≥98%
CAS Number140703-51-1170851-70-4
Molecular FormulaN/AC₃₈H₄₉N₉O₅
Available Formats5mg10mg, 10mg, 20mg, 10mg
Batch COAs Published2 on file
Stock StatusOut of stockIn stock

Research Disclaimer: This comparison is provided for educational purposes only. All products are sold exclusively for in vitro research use. The information presented is based on published preclinical and clinical research and does not constitute medical advice. Consult a qualified healthcare professional before making any decisions regarding peptide use.

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