IGF-1 LR3 Peptide | 1mg | Research Grade

IGF-1 LR3 UK availability is one of the most common research queries we receive — this page covers everything you need before ordering, including mechanism, purity testing, and storage guidance.

What Is IGF-1 LR3?

IGF-1 LR3 is a synthetic analogue of insulin-like growth factor 1 (IGF-1), modified with an amino acid substitution and extension at the N-terminus (the ‘Long R3’ modification) to reduce its binding affinity to IGF-binding proteins found in biological systems.

ApexPure supplies IGF-1 LR3 1mg exclusively for laboratory research use, manufactured as a lyophilised, research-grade compound. The LR3 modification is studied specifically for its effect on extending research half-life compared with native IGF-1, which is rapidly bound and cleared under normal physiological conditions.

Research Applications

Research literature has examined IGF-1 LR3 in relation to cell-proliferation assays, myoblast signalling, and comparative studies against native IGF-1 in preclinical models. It has been used in muscle-tissue research to study hypertrophy-related cell signalling pathways, and in broader growth-factor research examining IGF receptor activation in various cell-culture systems.

Background & Research History

IGF-1 LR3 was developed as researchers sought a version of IGF-1 that would remain active for longer in laboratory research settings, since native IGF-1 is quickly sequestered by binding proteins in biological systems. The Long R3 modification became a standard research tool for studying IGF-1 pathway activity without the rapid clearance that complicates work with the native hormone.

Purity & Third-Party Testing

Every batch is verified to a minimum of 99% purity via independent HPLC analysis, with a downloadable Certificate of Analysis specific to each batch, ensuring researchers can confirm compound identity before use.

Reconstitution & Storage Guidelines

Store lyophilised IGF-1 LR3 frozen at -18°C or below. Once reconstituted, keep refrigerated at 2–8°C, use promptly, and avoid repeated freeze-thaw cycling, as this compound is particularly sensitive to degradation from improper storage.

Handling Notes for Researchers

IGF-1 LR3 should be handled only by qualified laboratory personnel using appropriate PPE, following institutional protocols for reconstitution, storage, and disposal. This product is supplied strictly for laboratory research use.

Why Buy IGF-1 LR3 UK From ApexPure

ApexPure was built around one standard: every batch we sell is independently tested before it reaches your laboratory, and every Certificate of Analysis is published, not hidden behind a support request. IGF-1 LR3 is one of our higher-value compounds, and given its sensitivity to degradation, we take particular care with cold-chain-aware dispatch to ensure it arrives in the condition our COA describes. Orders are dispatched from the UK, so researchers avoid the customs delays and cold-chain uncertainty that come with importing from overseas suppliers. If a batch does not meet our purity threshold, it does not go on sale — that is the certification promise behind the ApexPure name. Read more about our testing process, or check our FAQ for common questions about ordering and dispatch. Our facility operates under documented quality-control procedures, with every incoming batch checked against its accompanying Certificate of Analysis before it is released into inventory. We work with independent, third-party laboratories rather than relying on internal or manufacturer-supplied test data, which is a distinction researchers increasingly look for when comparing UK suppliers. Packaging is designed to protect peptide integrity in transit, and orders are typically dispatched within one to two working days of purchase.

Frequently Asked Questions

Why is IGF-1 LR3 used instead of native IGF-1 in research?

The LR3 modification is studied for its reduced binding to IGF-binding proteins, giving researchers a longer-acting profile for study design compared with the rapidly cleared native hormone.

Does this product ship with reconstitution supplies?

Bacteriostatic water and related accessories can be added separately at checkout.

How sensitive is IGF-1 LR3 to storage conditions?

This compound is more sensitive to improper storage than many other research peptides — strict adherence to frozen storage and minimal freeze-thaw cycling is recommended for reliable results.

This product is sold strictly for laboratory and in-vitro research use only. It is not a drug, food, supplement, or cosmetic, and is not intended for human or veterinary consumption, diagnostic, or therapeutic use. Not for use in humans or animals. Purchaser must be 18+ and confirms this material will be handled only by qualified researchers in a controlled laboratory setting, in accordance with UK law.