Peptide Library
Searchable, scored, and cited. Every peptide page pulls live data from institutional sources (FDA, NIH, EMBL-EBI). Browse by goal below or filter by evidence quality.
Educational only — not medical advice. SmartPeptide does not prescribe, diagnose, or treat. Always consult a licensed healthcare provider before using any peptide, supplement, medication, or protocol.
Note on this filter: peptides appear here because oncology research is mentioned in their published literature — NOT because they are cancer treatments. No peptide on SmartPeptide is presented as a cancer therapy. Always work with a qualified oncologist.
IGF-1 LR3
MuscleInsulin-like Growth Factor 1, Long R3 variant — an analog of human IGF-1 with extended half-life (~20-30 hours vs. ~12 minutes for native IGF-1). Used in research; widely (and controversially) discussed in performance-enhancement communities. NOT FDA-approved for human use; the only approved IGF-1 product is mecasermin (native sequence).
MGF (Mechano Growth Factor / IGF-1Ec)
MuscleSplice variant of IGF-1 (specifically IGF-1Ec) produced locally in muscle in response to mechanical loading. Theorized to drive satellite-cell activation and muscle hypertrophy. Heavy bodybuilding-community interest. Limited human clinical-trial evidence. NOT FDA-approved.