IGF-1 LR3 Research Peptide

IGF-1 LR3 is an engineered analogue of insulin-like growth factor-1: an Arg3 substitution reduces binding-protein affinity and a 13-amino-acid N-terminal extension extends activity, making it the standard tool for sustained IGF signalling research in cell and tissue models.

At 83 amino acids, IGF-1 LR3 is a recombinant-class protein rather than a simple synthetic peptide — and one of the most counterfeited compounds in the research market. Our material is independently verified to ≥99% purity with MS identity confirmation, and every vial ships with its batch-specific COA.

Supplied lyophilised in sterile vials, dispatched tracked from our UK facility with cold-pack options available.

Orders placed before 4pm Monday–Friday are dispatched the same working day. Standard tracked UK delivery (1–2 working days) is £4.99, or free on orders over £25; next-working-day delivery is available at checkout. All orders ship in plain, tamper-evident packaging with no external indication of contents.

Every order is covered by our 7-day money-back guarantee: if anything arrives damaged or incorrect, contact us within 7 days and we will replace it or refund you in full. Volume pricing applies automatically — 20% off orders over £150 and 30% off over £500. See our shipping page for full details, including European delivery.

Store at -20°C. Reconstitute with dilute acetic acid per protocol; refrigerate at 2–8°C and use promptly.

Reconstitute under sterile laboratory conditions using bacteriostatic water. Handle only with appropriate laboratory PPE and procedures.

IGF-1 LR3 is supplied strictly for in-vitro laboratory research purposes only. It is not a medicine, supplement or cosmetic, and is not intended for human or veterinary use, consumption, or diagnostic purposes. By purchasing you confirm you are a qualified researcher or institution and agree to our Research Use Terms.