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Growth Hormone Secretagogues

Ipamorelin

Research compound. This is not a dietary supplement. Unless it is identified as an approved prescription drug, it is not approved by the FDA for human use. This page summarizes published research for education only; we do not sell it or link to sellers.

Ipamorelin. A selective growth-hormone-releasing peptide that produces clean GH pulses without major cortisol or prolactin spikes.

How it works. Activates the GHS-R1a receptor on pituitary somatotrophs, triggering pulsatile growth-hormone release without strongly affecting cortisol or prolactin.

What the research supports. 3 graded claims. Strongest: Better sleep quality and recovery reported anecdotally (preclinical).

Hormonal impact. Effects on Growth hormone (GH), IGF-1, Cortisol, Prolactin.

Side effects and interactions. 2 medication interactions listed. Serious: Long-term effects on insulin sensitivity are not fully characterized.

Stacking. Pairs well with CJC-1295 (without DAC). Avoid combining with Active malignancy.

Common forms. Available as Subcutaneous injection.

Community. Experiences from people who have tried Ipamorelin. Anecdotes are not medical advice.

Ipamorelin. A selective growth-hormone-releasing peptide that produces clean GH pulses without major cortisol or prolactin spikes.

Molecular structureC38H49N9O5 · 711.9 g/mol

What it is

Ipamorelin is a pentapeptide ghrelin-receptor agonist (GHRP) designed to stimulate the pituitary to release growth hormone in pulses similar to natural physiology.

How it works

Activates the GHS-R1a receptor on pituitary somatotrophs, triggering pulsatile growth-hormone release without strongly affecting cortisol or prolactin.

Pathways

  • GHS-R1a → GH release
  • Downstream IGF-1 production in liver

Effects

  • ↑Pulsatile growth hormone release increases
  • +Lean mass and recovery supports
  • +Deep sleep architecture optimizes

What the research supports

Better sleep quality and recovery reported anecdotallypreclinical
Improved body composition over weeks of consistent usepreclinical
May support skin and connective-tissue quality via IGF-1preclinical

Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.

Hormonal impact

↑Growth hormone (GH)increases
↑IGF-1increases
=Cortisolstabilizes
=Prolactinstabilizes

Side effects & interactions

Common side effects

  • Transient head rush or flushing
  • Mild hunger spike
  • Injection-site irritation

Serious

  • Long-term effects on insulin sensitivity are not fully characterized

Medication interactions

Glucocorticoidsmoderate

May blunt GH response.

Insulin / sulfonylureasmoderate

GH can reduce insulin sensitivity over time.

Check any supplement–medication combination with your pharmacist before starting.

Combines with

Pairs well

Avoid combining

  • Active malignancyGH/IGF-1 axis stimulation is generally avoided.

Common forms

  • Subcutaneous injection

Discussion

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