IGF-1 LR3 Research Protein
IGF-1 LR3 is a laboratory-made version of IGF-1, a growth factor the body produces in response to growth hormone.
- Purity
- >99%
- Dispatch
- Dispatched next business day with cold-chain delivery
- Cold chain
- Temperature-controlled packaging from lab to door
- Certificate
- Batch-specific Certificate of Analysis available on this page
Multi-vial Discount Available
Select Size
Ships Next Day
Orders confirmed before 12pm EST ship the same business day; orders after 12pm EST ship the next business day. Monday to Friday.
Quality Guaranteed
Every batch is HPLC-tested to >99% purity. Certificate of Analysis available on this page; MSDS available on request.
Verify Batch
Lot-level COA, Batch PP/IGF/062026. Check the batch number printed on your vial against the certificate below, which reports the tests run on it.
What is IGF-1 LR3?
IGF-1 LR3 is a laboratory-made version of IGF-1, a growth factor the body produces in response to growth hormone. Two things have been changed. One building block near the front has been swapped for arginine, and a 13-link tail has been added to the front end. Native IGF-1 is 70 links long; this version is 83. Both changes were made to stop it sticking to the carrier proteins that normally hold IGF-1 in check.
Technical Specs
Labeled quantity is net peptide content, not gross salt weight.
IGF-1 LR3 Research & Reference
What IGF-1 LR3 does in published studies, and how to work with it in the laboratory, are covered in full on two dedicated pages rather than summarised here, so neither the evidence nor the handling detail is cut short.
Certificates of Analysis
Every batch is tested by an independent laboratory before release. The certificate covering this batch of IGF-1 LR3, and its safety data sheet, are below as PDFs, so the figures on this page can be checked against the source.
Frequently Asked Questions
Is IGF-1 LR3 independently tested for purity?+−
Yes. Every batch of IGF-1 LR3 is tested by an independent third-party laboratory using HPLC and MS-UPLC, confirming purity and mass identity before the batch is released. Pure Peptides does not test its own material.
Can I see the Certificate of Analysis before buying?+−
Yes. The Certificate of Analysis for the batch currently in stock can be viewed and downloaded directly on this page, before you place an order. Each certificate states the batch number, the measured purity, and the date of analysis, and can be verified independently with the issuing laboratory using the report number it carries.
What does "Research Use Only" mean?+−
It means IGF-1 LR3 is supplied for in-vitro laboratory research and for no other purpose, and must not be administered to humans or animals. IGF-1 LR3 is legal to purchase in the United States for in vitro and non-clinical laboratory research. It carries no FDA approval or therapeutic indication for human use. As an IGF-1 analogue, IGF-1 LR3 appears in section S2 of the WADA Prohibited List for competitive athletes, a separate consideration from its legal research status. Sold strictly for qualified research use, not human or veterinary administration.
How is IGF-1 LR3 shipped and stored?+−
IGF-1 LR3 ships from US stock with cold-chain packaging and full tracking; orders placed before noon EST on business days are typically dispatched the same business day. On arrival, store the lyophilized powder at -20°C or below, dry and protected from light.
Does IGF-1 LR3 increase growth in animal studies?+−
It depends on the species, and published work is explicit about that. Analogues of this type raise growth in rats. In pigs, a four-day infusion reduced average daily gain and food intake, lowered plasma IGFBP-3, IGF-I and insulin, and cut mean plasma growth hormone by 23%. Researchers should read the primary literature for the species they are working in.
From the blog
Background and context on this compound.
Related Compounds
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