Ipamorelin vs Tesamorelin: Complete 2026 Comparison
Side-by-side comparison of Ipamorelin and Tesamorelin: mechanism, common use cases, dosing protocols from named experts, vendor availability, and expert opinion. Both are framed as research compounds.
TL;DR Table
| Factor | Ipamorelin | Tesamorelin |
|---|---|---|
| Class | PEPTIDE | PEPTIDE |
| Aliases | ["hyperarilin"] | ["tesmarellin"] |
| Mechanism | n/a | n/a |
| What it's researched for | GH secretagogue / ghrelin mimetic used to amplify endogenous growth hormone pulses, often paired with tesamorelin. | GHRH analog that stimulates endogenous GH/IGF-1; FDA-approved for HIV-lipodystrophy. |
| Dosing mentions tracked | 31 | 97 |
| Vendor recs tracked | 7 | 12 |
| PubMed papers | 15 | 15 |
Mechanism Comparison
What Each is Researched For
Ipamorelin research areas
GH secretagogue / ghrelin mimetic used to amplify endogenous growth hormone pulses, often paired with tesamorelin.
Tesamorelin research areas
GHRH analog that stimulates endogenous GH/IGF-1; FDA-approved for HIV-lipodystrophy.
Dosing Mention Comparison
Ipamorelin dosing
- speaker: Speaker cautions that commercial Tesamorelin/Ipamorelin blend ratios may run high and cause water retention; says Ipamorelin is not... (00:00:43)
- Host: Human studies described a growth hormone pulse that typically peaks around 40 minutes after ipamorelin is taken. (00:02:26)
- Host: Host described research in which ipamorelin was administered repeatedly over 21 days without apparent pituitary desensitization. (00:02:40)
- VS: VS reported: 150-300 mcg subcutaneous twice daily (conservative); some run up to 3x daily. (00:04:42)
- Dr. Jones DC: Dr. Jones DC reported the following protocol: Inject before bed, a couple hours after the last meal, when insulin is low and natural... (00:05:35)
Tesamorelin dosing
- speaker: The speaker reported taking Tesamorelin before bed, fasted 2 to 3 hours after the last meal. (00:00:02)
- speaker: Users report timing Tesamorelin administration to coincide with the first few hours of deep sleep, when the body's largest growth... (00:00:16)
- Unknown narrator: Tesamorelin was given for 12 months in the referenced fatty liver study; transcript does not state dose or administration frequency. (00:00:22)
- speaker: Users have reported timing tesamorelin doses away from meals, citing research that insulin spikes may suppress the growth hormone response. (00:00:26)
- speaker: A user reported following a protocol of Tesamorelin 5 days on, 2 days off. (00:00:41)
Side Effect Notes
Anecdotal reports for both compounds vary by route, dose, and individual. Neither should be treated as an approved medication. Consult a qualified clinician.
When To Choose Which
Comparison depends on research question, available source quality, and individual risk tolerance. See the full profiles for Ipamorelin and Tesamorelin for context-specific details.
Can You Stack Them?
Stacking decisions should be evaluated by qualified professionals with attention to dose attribution, source quality, and outcome tracking. This page is a research aggregator and does not recommend stacking protocols.
FAQ
Which has more research?
Ipamorelin has 15 PubMed citations indexed; Tesamorelin has 15.
Which has more vendor coverage?
Ipamorelin: 7 tracked vendor recommendations. Tesamorelin: 12.
Are they approved drugs?
Both are framed on this site as research compounds. Verify current FDA status and state-specific rules before any decision.
Where do I read more?
See Ipamorelin and Tesamorelin for full profiles with all dosing mentions and PubMed citations.