IGF-1 LR3
A modified insulin-like growth factor with a longer half-life—highly potent and tightly regulated.
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IGF-1 LR3
Fitness peptides are often sold for “research use”—learn the compound before trusting a label.
Structure (cute edition)
This peptide is a short chain of about 4 amino acids—think of it as a tiny protein necklace on your label.
INCI: IGF-1 LR3 · ~4 amino acids in our simplified view
Research & public records
Counts and links from public databases (PubMed, ClinicalTrials.gov, Wikidata, NIH drug nomenclature). Educational only — not medical advice.
Knowledge base: protein — Wikipedia
PubMed: 10 indexed papers (search PubMed)
- Revolutionary decellularized Alstroemeria stem-based nerve conduit integrated with GelMA and controlled IGF-1 LR3 release for enhanced rat sciatic nerve regeneration. · International journal of biological macromolecules
- IGF-1 LR3 does not promote growth in late-gestation growth-restricted fetal sheep. · American journal of physiology. Endocrinology and metabolism
- Intranasal long R3 insulin-like growth factor-1 treatment promotes amyloid plaque remodeling in cerebral cortex but fails to preserve cognitive function in male 5XFAD mice. · Journal of Alzheimer's disease : JAD
- Recombinant expression of IGF-1 and LR3 IGF-1 fused with xylanase in Pichia pastoris. · Applied microbiology and biotechnology
- Attenuated glucose-stimulated insulin secretion during an acute IGF-1 LR3 infusion into fetal sheep does not persist in isolated islets. · Journal of developmental origins of health and disease
- N-Linked Glycosylation in Chinese Hamster Ovary Cells Is Critical for Insulin-like Growth Factor 1 Signaling. · International journal of molecular sciences
- Reduced glucose-stimulated insulin secretion following a 1-wk IGF-1 infusion in late gestation fetal sheep is due to an intrinsic islet defect. · American journal of physiology. Endocrinology and metabolism
- IGF-1 infusion to fetal sheep increases organ growth but not by stimulating nutrient transfer to the fetus. · American journal of physiology. Endocrinology and metabolism
ChEMBL: MECASERMIN · max phase 4.0
What brands say it does
IGF-1 LR3 binds IGF receptors to promote muscle cell hyperplasia. It is significantly more potent than endogenous IGF-1 and carries hypoglycemia risk. Banned in sport; not a casual recovery peptide.
Where you’ll find it
Advanced performance communities and research settings only.
Other names you might see
Long R3 IGF-1
Insulin-like growth factor 1 LR3
Compare with similar peptides
Similar peptides
Educational only—not medical advice. Many compounds here are banned in sport and not FDA-approved for OTC use.