Ipamorelin vs Sh-Polypeptide-1
Head-to-head comparison of Ipamorelin and Sh-Polypeptide-1 for research applications. Both peptides are studied for various research applications, but they differ significantly in mechanism and evidence level.
Side-by-Side Comparison
| Attribute | Ipamorelin | Sh Polypeptide 1 |
|---|---|---|
| Category | Growth Hormone Secretagogue | Cosmetic Peptide |
| Mechanism | Ipamorelin (sequence: Aib-His-D-2Nal-D-Phe-Lys-NH2) selectively binds to the Growth Hormone Secretagogue Receptor (GHS-R1a) on anterior pituitary somatotroph cells, increasing cAMP and activating protein kinase A to promote pulsatile GH secretion. | Sh-polypeptide-1 is biologically identical to native human EGF and binds the same EGFR receptor, activating MAPK/ERK and PI3K/Akt signaling to promote keratinocyte and fibroblast proliferation, migration, and differentiation. |
| Evidence Rating | D — Preclinical | F — No Regulatory Activity |
| Clinical Status | Research-only / Not approved for human use | Cosmetic ingredient. Clinical data draws on general EGF research rather than studies specific to this INCI name. |
| Safety Profile | Widely regarded as the mildest GHS available; minimal side effects in published animal and human studies; Common: mild temporary "head rush" or flushing immediately after injection due to sudden vasodilation | Same safety profile as EGF — generally well tolerated topically; No significant adverse effects reported in cosmetic use |
Overview
Ipamorelin and Sh-Polypeptide-1 are both research peptides studied across multiple applications. This comparison examines their mechanisms, evidence base, and safety profiles to help researchers understand the key differences and overlaps.
Ipamorelin — Mechanism & Evidence
Ipamorelin is the most selective growth hormone secretagogue (GHS) available, a synthetic pentapeptide (MW ~711.86 g/mol, formula C38H49N9O5) that stimulates pulsatile GH release from the pituitary gland without significantly affecting cortisol, prolactin, or appetite. It is widely regarded as the mildest GHS, making it popular in anti-aging, body composition, and recovery contexts. However, research on ipamorelin is limited, and it is not FDA-approved for any indication.
Key claims: Increases growth hormone levels; Improves body composition; Improves sleep quality.
Ipamorelin 5mg
5mg
Sh-Polypeptide-1 — Mechanism & Evidence
Sh-polypeptide-1 is the INCI (International Nomenclature of Cosmetic Ingredients) designation for recombinant human epidermal growth factor (rh-EGF) produced by bioengineering (typically in E. coli or yeast expression systems). The "sh" prefix indicates a synthetic human protein. It differs from oligopeptide-1 primarily in nomenclature and regulatory classification rather than in biological activity. Clinical evidence specific to this designation is limited; much of the supporting data comes from EGF research generally.
Key claims: Anti-aging and skin renewal; Promotes wound healing.
Shared Research Applications
These peptides target different research areas. Ipamorelin focuses on Anti-Aging, Body Composition, Sleep, while Sh-Polypeptide-1 targets Anti-Aging Skincare.
Safety Considerations
Ipamorelin: Widely regarded as the mildest GHS available; minimal side effects in published animal and human studies Common: mild temporary "head rush" or flushing immediately after injection due to sudden vasodilation GH-related effects: joint discomfort, mild water retention (1-3 lbs), transient blood glucose elevation in 5-25% of users, usually resolving within 2-4 weeks
Sh-Polypeptide-1: Same safety profile as EGF — generally well tolerated topically No significant adverse effects reported in cosmetic use Produced by bioengineering with high purity standards possible
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Quality Documentation
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Product cards on this page link to current catalog entries and available quality documentation.
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