Sermorelin + GHRP-6 Stack
| Category | Stacks |
|---|---|
| Also known as | Sermo GHRP-6 |
| Last updated | 2026-04-14 |
| Reading time | 2 min read |
| Tags | stackgrowth-hormoneghrhghrpappetite |
Overview
The Sermorelin + GHRP-6 Stack combines the GHRH analog Sermorelin with the first-generation ghrelin receptor agonist GHRP-6. It is one of the oldest growth hormone secretagogue combinations and is distinguished by GHRP-6's pronounced appetite-stimulating effect — a feature that makes it useful in research models of cachexia, anorexia, or recovery from illness, but a drawback in body-recomposition studies.
Compounds in This Stack
- Sermorelin — Truncated GHRH analog (GRF 1-29) with established human pharmacology data.
- GHRP-6 — Hexapeptide ghrelin receptor agonist with strong GH-releasing and appetite-stimulating effects.
Rationale
Sermorelin engages the GHRH receptor, and GHRP-6 engages the ghrelin receptor (GHSR-1a). The combination produces synergistic GH release, the same fundamental mechanism that underlies all GHRH + GHRP research designs.
What sets GHRP-6 apart is its more pronounced ghrelin-mimetic activity. It robustly stimulates appetite within thirty minutes of administration, unlike Ipamorelin (which is largely appetite-neutral). For research models studying GH release in the context of intentional caloric surplus or recovery from cachectic states, this is desirable. For lean recomposition models, it is generally not.
Research Context
| Component | Receptor | Distinguishing Feature |
|---|---|---|
| Sermorelin | GHRH receptor | Established human pharmacology |
| GHRP-6 | Ghrelin receptor | Strong appetite stimulation, mild prolactin/cortisol elevation |
GHRP-6 has been studied in cachexia, post-operative recovery, and pediatric short stature contexts in addition to GH research.
Typical Research Parameters
The stack is generally studied with two to three administrations per day. Pre-bedtime dosing aligns with natural GH pulses. Researchers note that the appetite signal from GHRP-6 typically attenuates with repeated administration over days to weeks, though the GH-releasing effect persists.
Considerations
The appetite stimulation from GHRP-6 is the dominant practical consideration. Cortisol and prolactin elevation, while mild, are higher than with Ipamorelin-based stacks. The stack is research-only and not a clinical GH replacement protocol.
Related Stacks
- [Sermorelin + GHRP-2 Stack](/wiki/sermorelin-ghrp-2-stack)
- [CJC-1295 + Ipamorelin Stack](/wiki/cjc-1295-ipamorelin-stack)
- MOD-GRF + Ipamorelin Stack
- [Hexarelin + CJC-1295 Stack](/wiki/hexarelin-cjc-1295-stack)
- Tesamorelin + Ipamorelin Stack
Related Compounds
Related entries
- GHRP-6— A synthetic hexapeptide growth hormone secretagogue and ghrelin receptor agonist known for potent GH release accompanied by significant appetite stimulation and broader hormonal effects.
- Sermorelin— A 29-amino-acid synthetic analog of growth hormone releasing hormone (GHRH) with a history of FDA approval, studied for age-related GH decline, pediatric growth deficiency, and anti-aging applications.