Comparison tool
Compare peptides
Pick up to three compounds. Useful for deciding whether two peptides in a stack actually do different things, or whether you're paying twice for the same pathway.
Select up to three (1/3)
Comparison results
| Attribute | |
|---|---|
| Category | Sexual health |
| Evidence grade | Emerging |
| Also known as | Metastin fragment 45-54 |
| Mechanism | Binds KISS1R on GnRH neurons, stimulating pulsatile GnRH release and downstream LH and FSH secretion — the master switch of the hypothalamic–pituitary–gonadal axis. |
| Key benefits | Increased LH and testosterone signalling · Enhanced limbic response to sexual stimuli in imaging studies · Fertility applications under investigation |
| Side effects | Limited safety data · Headache · Possible hormonal disruption with chronic use |
| Half-life | Under 30 minutes |
| Administration | Subcutaneous injection |
| Dosing overview | Research doses vary; community use is typically low-microgram and infrequent |
| Storage | Refrigerated after reconstitution |
| Legal status | Research chemical, not approved for human use. |
Dosing figures reflect published literature and commonly reported community protocols. They are informational only.
Head-to-head comparisons
Each comparison below is its own page with the full attribute table, key differences and shared attributes for that pairing. They are grouped by the category the compounds are indexed under.
GLP-1 receptor agonists
Direct comparisons between the incretin-based compounds most often searched against one another.
Metabolic and GLP-1 compounds
Compounds indexed under metabolic use, including the GLP-1 receptor agonists and the smaller fat-metabolism peptides often searched alongside them.
Recovery and tissue repair
Pairings between compounds indexed for healing, connective tissue and post-injury recovery.
Growth-hormone axis
Secretagogues and releasing peptides that act on growth-hormone signalling, compared with each other and with adjacent compounds.
Longevity and mitochondrial
Compounds indexed under longevity, cellular and mitochondrial function.
Sexual health
Melanocortin and related compounds indexed for sexual-health use.