At a glance
Effects
- Lean Muscle Support: IGF-1-mediated enhancement of protein synthesis, satellite cell activation, and muscle fiber regeneration supports lean mass development [5].
- Fat Loss / Metabolic Enhancement: GH-driven lipolysis promotes fat breakdown and improved metabolic efficiency, particularly in combination with adequate exercise [3].
- Recovery & Tissue Repair: Elevated GH and IGF-1 promote cell regeneration and connective tissue restoration, benefiting recovery from training or injury [3][8].
- Sleep Quality Improvement: GH release is closely tied to deep sleep; ipamorelin may enhance natural GH secretion during sleep cycles, improving sleep quality and recovery [5].
- Bone Density Support: IGF-1-mediated stimulation of osteoblasts and enhanced collagen synthesis in bone matrix have been observed in animal models [9].
GHRP / GHS-R1a agonist (peptide)
~2 hours
Subcutaneous injection
30–45 min post-injection
Investigational — not FDA approved for therapeutic use
About Ipamorelin
Every point here is drawn from public medical and harm-reduction sources. A bracketed number after a claim — like [1]— is a reference: tap it to open the exact source it's based on (numbered list at the bottom). It is not a rating or score. Educational information, not medical advice.
Product specifics
- Est. delivery
- 3–7 business days · EU tracked
Product details as stated by the vendor (claims, not independently verified). Delivery is our standard EU estimate.
What it is
Ipamorelin is a synthetic pentapeptide classified as a growth hormone secretagogue receptor (GHS-R1a) agonist and a member of the Growth Hormone Releasing Peptide (GHRP) family [1][2]. It is used to stimulate the body's own pituitary gland to release growth hormone (GH) in a pulsatile, physiologically-mimicking manner for purposes including recovery, body composition, anti-aging, and performance [3].
How it works
Ipamorelin binds selectively to the ghrelin receptor (GHS-R1a) in the hypothalamus and anterior pituitary, reducing somatostatin's inhibitory tone and triggering a rapid, pulsatile pulse of endogenous GH secretion [1][4]. This downstream GH surge stimulates the liver to produce insulin-like growth factor 1 (IGF-1), which mediates anabolic effects on muscle, bone, and connective tissue [5]. Critically, unlike earlier-generation GHRPs (e.g. GHRP-2, GHRP-6), ipamorelin does not significantly raise cortisol, prolactin, or ACTH at standard doses, giving it a notably cleaner hormonal profile [2][6]. GH concentrations peak approximately 30–45 minutes post-injection and return to baseline within 2–3 hours [7].
Risks & side effects
Most important: Because GH and its downstream mediator IGF-1 promote cellular proliferation and inhibit apoptosis, anyone with active or suspected malignancy must not use ipamorelin, as elevated GH/IGF-1 signalling can theoretically accelerate tumour progression [10][11]. Long-term human safety data are limited, so use beyond studied short-to-medium-term durations carries uncharacterised risk [12].
Common
Serious
- Insulin resistance / worsened glucose tolerance with chronic or high-dose use — GH antagonises insulin signalling [10][15]
- Pituitary receptor desensitisation with continuous high-frequency dosing, potentially blunting natural GH pulsatility [16]
- Thyroid interaction: ipamorelin may increase T4-to-T3 conversion, requiring thyroid hormone dose adjustments in hypothyroid patients [10]
- Theoretical tumour-proliferative risk via IGF-1/PI3K/Akt/mTOR pathway activation in individuals with occult or existing malignancy [10][11]
Safety & harm reduction
- Active or suspected malignancy — GH/IGF-1 stimulation may support tumour growth and inhibit apoptosis [10][11]
- History of hormone-sensitive cancers (breast, prostate, endometrial, thyroid) unless cleared by an oncologist [10]
- Pregnancy or breastfeeding — no safety data exist [15]
- Children and adolescents outside supervised clinical settings — open growth plates make GH manipulation risky [15]
- Acromegaly or established elevated baseline IGF-1 — additional GH-axis stimulation compounds existing risk [11]
- Baseline and periodic IGF-1 levels — the primary biomarker of GH-axis activity [7][19]
- Fasting blood glucose and HbA1c — GH has insulin-antagonist effects; monitor for emerging insulin resistance [10][17]
- Thyroid function panel (TSH, Free T3/T4) if using thyroid medication, as conversion rates may shift [10]
- Blood pressure monitoring during extended protocols [14]
- Exogenous HGH — combining with recombinant GH creates excessive, non-pulsatile GH elevation and should be avoided [15]
- Insulin / oral hypoglycaemics — GH opposes insulin; diabetic patients may require medication adjustment [10]
- Thyroid hormone replacement — ipamorelin may alter T4→T3 conversion; monitor and adjust dose as needed [10]
- Glucocorticoids — may blunt GH secretagogue response; interaction is pharmacodynamic [6]
- Administer via subcutaneous injection; rotate sites (abdomen, upper arm) to minimise tissue irritation [14]
- Commonly reported cycling protocol: 12–16 weeks on, 4–8 weeks off to preserve receptor sensitivity and pituitary responsiveness [12]
- No PCT is required upon cessation — GH and IGF-1 return gradually to baseline with no acute hormonal rebound [19]
- Inject on an empty stomach or post-workout to avoid blunting of GH pulse by elevated blood glucose/insulin [8]
- Store lyophilised peptide refrigerated; reconstitute with bacteriostatic water and discard per manufacturer guidance to avoid contamination risk [20]
Dosage context
Commonly reported in clinical wellness and performance settings: 200–300 mcg per day administered via subcutaneous injection, often split into multiple doses (e.g. pre-bed and/or post-workout) [14]. A 2009 phase I study used weight-based doses of 0.06–1.2 mcg/kg, with GH peak at 30–45 min and return to baseline within 3–4 hours [7]. These are commonly reported ranges ONLY — not a prescription or clinical recommendation. Individual response, health status, and medical oversight are essential before use.
Sources
- 1.Peptpedia — Ipamorelin Mechanism & Studies
- 2.Wikipedia — Ipamorelin
- 3.Formation Med — What Does Ipamorelin Do?
- 4.Superpower.com — Ipamorelin: A Selective Ghrelin Receptor Agonist
- 5.Paragon Sports Medicine — Ipamorelin Peptide
- 6.Swolverine — How Ipamorelin Works
- 7.RealPeptides — FDA Status & Regulatory Explained
- 8.Swolverine — Ipamorelin Cycle Guide
- 9.Peptpedia — Bone Growth Studies
- 10.RealPeptides — Ipamorelin Contraindications
- 11.PeptidesExplorer — Benefits, Dosage & Side Effects
- 12.Peptidepedia — Side Effects & Safety Profile 2026
- 13.Tucson Wellness MD — Side Effects, Risks & Safety
- 14.SeekPeptides — Complete Safety Guide
- 15.Huddle Men's Health — Benefits, Dosage & Risks
- 16.FormBlends — Complete Safety Profile
- 17.Grokipedia — Ipamorelin
- 18.Superpower.com — Unregulated supply-chain risk
- 19.Grokipedia — Monitoring & Post-cycle
- 20.Dr. Dan Wool — CJC-1295 / Ipamorelin Safety
This information is provided for educational and harm-reduction purposes only. It is not medical advice. These substances can carry serious health risks; effects and safe use vary by individual. Consult a qualified healthcare professional before use. Legal status varies by country — it is your responsibility to know your local law. We do not encourage misuse.
Other options for Ipamorelin· 2 offers
Same compound from different labs/brands and pack sizes. Tap a row to switch brand — the price and buy button update instantly.
| Brand | Form | Strength | Pack | Price | Per mg |
|---|---|---|---|---|---|
GenericSelected | vial | 10 mg | 10 vial | 179,99 € | — |
Generic | vial | 5 mg | 10 vial | 429,99 € | — |