Ipamorelin vs Tesamorelin
Research & educational use only. This content is not medical advice. Consult a qualified healthcare professional before using any peptide compound.
Ipamorelin and Tesamorelin are both growth hormone peptides that come up together constantly. This is a side-by-side comparison on the data that actually matters — evidence tier, FDA status, human trials, and how to source each safely — not hype. It is for research and educational purposes only.
Ipamorelin vs Tesamorelin: side-by-side
| Ipamorelin | Tesamorelin | |
|---|---|---|
| Evidence tier | Tier 3 | Tier 1 |
| FDA status | Not FDA Approved | FDA Approved |
| Human RCTs | 0 | 6 |
| Subjects enrolled | 0 | 800 |
| Animal studies | 20 | 15 |
| Category | growth hormone | growth hormone |
| Half-life | Reported plasma half-life around 2 hours in animal models. | Approximately 25-40 minutes. |
| Community logs | 1 | 0 |
Key differences
Tesamorelin rests on stronger human evidence (Tier 1) than Ipamorelin (Tier 3) — that means more confidence its observed effects are real rather than artefacts of weaker study designs. Tesamorelin is FDA approved for specific uses, while Ipamorelin is not fda approved and treated as a research compound in the US.
Ipamorelin has 0 human trials on record (0 subjects) versus Tesamorelin's 6 (800 subjects). Evidence tiers are a shorthand for how strong that human data is — see our guide to understanding peptide evidence tiers for how to weigh them.
What is Ipamorelin?
Ipamorelin is a synthetic pentapeptide and selective growth hormone secretagogue that mimics ghrelin at the GHS-R1a receptor to stimulate pulsatile growth hormone release. It is not FDA-approved and has not been evaluated in published human efficacy randomized controlled trials; the evidence base is preclinical. It is… Full Ipamorelin breakdown →
What is Tesamorelin?
Tesamorelin is a synthetic growth hormone-releasing hormone (GHRH) analog approved by the FDA (as Egrifta) to reduce excess visceral abdominal fat in people with HIV-associated lipodystrophy. It is supported by phase 3 randomized controlled trials for that specific indication. It is a prescription medication and is… Full Tesamorelin breakdown →
Where to buy Ipamorelin or Tesamorelin safely
Both are sold by research-chemical suppliers, not pharmacies, so the source matters as much as the compound. Before buying either, vet sellers on third-party lab testing and enforcement history in the ranked directory of trusted peptide sellers — or jump straight to vetted sources for Ipamorelin or Tesamorelin. PeptidesHub does not sell either compound.
Frequently asked questions
Ipamorelin and Tesamorelin are both growth hormone peptides. Tesamorelin rests on stronger human evidence (Tier 1) than Ipamorelin (Tier 3) — that means more confidence its observed effects are real rather than artefacts of weaker study designs. Tesamorelin is FDA approved for specific uses, while Ipamorelin is not fda approved and treated as a research compound in the US. See each compound's full evidence breakdown for the underlying studies.