Description
IGF-1LR3 1 mg — Opti-Gen Peptides
For laboratory research use only.
Not for human use. Not for veterinary use.
This listing is not an MHRA-licensed medicine.
Research-grade synthetic peptide supplied as a 1 mg sealed vial for lawful laboratory research in the UK. Not a food, supplement or medical device. Not for diagnostic or therapeutic use. Must not be administered to people or animals.
Licensed IGF-1 (mecasermin) is a separate prescription medicine. This vial is not that product.
Identification
| Product name | IGF-1 LR3 |
| Also listed as | Long R3 IGF-1; Long Arg3 IGF-1 |
| Supplier | Opti-Gen Peptides |
| Contents | 1 mg per vial |
| Description | IGF-1 analogue with Arg³ substitution and N-terminal extension |
| CAS | 143045-27-6 |
| Approx. length / mass | 83 aa; ~9.1 kDa |
| Intended use | Laboratory / in-vitro research only |
Not IGF-1 DES(1–3) unless the COA says so.
Quality / storage
Only the lot COA applies. Store as a laboratory protein under institutional SOP. No preparation or application instructions on this page.
Published research context (not product claims)
Long Arg3 IGF-1 is used in literature as an IGF-1 receptor research ligand. The Arg³ change and N-terminal extension are studied because they alter IGF-binding-protein interaction versus native IGF-1 in assays. Those papers are experimental. They are not muscle-growth claims for this vial.
IGF-axis peptides are WADA-prohibited in sport. There is no UK marketing authorisation for this research listing.
UK notice
18+. Buyer confirms lawful laboratory research use only and will not use or resell for unauthorised human or animal use.







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