Research use only
Kovalabs supplies research-grade peptides to qualified researchers for laboratory use only. They are not medicines, are not for human or animal consumption, and are supplied with no dosing or medical guidance.
You must be 18 or over and a qualified person purchasing solely for scientific research.
Selecting ‘I agree’ confirms the above and your acceptance of our Research Disclaimer and Terms of Sale.
Manufactured for laboratory research. Not for human or veterinary use. Read full disclaimer →
IGF-1 LR3 is a synthetic long-arginine-3 analogue of insulin-like growth factor 1, studied in research into IGF-1-receptor signalling and cellular-growth pathways in experimental models.
IGF-1 LR3 (Long R3 IGF-1) is a recombinant 83-amino-acid analogue of insulin-like growth factor 1, identified by CAS number 946870-92-4. It differs from native IGF-1 by an arginine substitution at position 3 and a 13-residue N-terminal extension. It is supplied as a lyophilised solid for laboratory research only.
It carries the molecular formula C400H625N111O115S9 and a molecular weight of 9117.6 g/mol. As a large recombinant protein it has no small-molecule 2D structure record. It is a peptide reference material, not a supplement, food or consumer product.
Native IGF-1 is the endogenous insulin-like growth factor 1. IGF-1 LR3 is an engineered analogue: the Long R3 modification (arginine at position 3 plus an N-terminal extension) is a structural change to the molecule. The two are distinct reference compounds. This describes what the molecules are, not any effect in a body.
IGF-1 LR3 is not a controlled drug under the Misuse of Drugs Act 1971 and may be supplied in the UK as a research chemical. It is not a licensed medicine and is not authorised for human or veterinary use. Kovalabs supplies it for laboratory research only. The buyer is responsible for lawful handling under applicable local regulations. See our research disclaimer.
Each batch is released after independent analytical testing. Purity is assessed by HPLC at >= 99% and identity is confirmed against the expected mass for C400H625N111O115S9 (9117.6 g/mol). Not all material sold under this name is equivalent: confirm a current Certificate of Analysis. Batch documentation is available on our Certificates of Analysis page.
The published literature investigates IGF-1 receptor (IGF-1R) signalling and the growth-hormone / IGF axis in pre-clinical and in-vitro model systems. None of this establishes a benefit, effect or outcome in humans, and IGF-1 LR3 is not a licensed medicine. For mechanistic and study-design detail, see the IGF-1 LR3 research monograph; the product page covers identity, legality, quality and supply only.
IGF-1 LR3 is supplied as a lyophilised white to off-white powder. For laboratory handling it is reconstituted in a suitable solvent such as bacteriostatic water. Store the lyophilised solid at -20C, dry and protected from light; hold reconstituted material at 2-8C. Browse the wider GH-axis research range or related reference peptides Ipamorelin, Sermorelin and GHRP-6. For laboratory research use only; not for human or veterinary use.
IGF-1 LR3 1mg
IG1-290
99.90%
Peptide purity
Pairs with this
Very good range of selection, with certificates for everyone of them too. Also checked them out of being paranoid, and they all trace back to the actual lab too, which is surprisingly rare in the peptide world. Great job, very happy. I’ll be a loyal customer for sure.
By far the best, by a country mile
I’ve used probably around 10 companies in the past year or so. And I can hands down vouch that kovalabs are by far the best, by a complete country mile too. This is based on my experience of being on my 5th order with them so far, and I dont intend to go anywhere else in the future. So starting off, most importantly the qualty of the peptides themselves are undoubtedly the best. And I also love the fact that they have it tested by an accredited company. AND that it’s done per batch. Secondly, shipping has always arrived next day, without fail. Finally and not least, the customer support are incredible, fast, polite and patient. Also feels very ‘family run’ which I personally appreciate. Highly recommend, keep it up!
Excellent company
I wanted to leave a review based on the exceptional customer service I received. Long story short, my package was delayed due to the courier (not kovalabs fault), when I got in touch, Charlotte responded instntly, proffesionally and she went completely above and beyond my expectations in putting the situation right. I dont think I remember another time where a company has acted in the way they have with me. Absolutely brilliant. A* all around. Plus when the prducts did come, everything was exceptionally packaged with a little hand written note too. Again, highly recommended to anyone who value's quality products from a quality company.
Best company i've ever dealt with in any space, not just peps! Recommended to all my fellow researchers, you wont be disappointed!!
Responds lightning fast
Kovalabs unlike others responds lighting fast to questions and offers very competitive pricing for high quality products. I have literally zero complaints, I'm here for the longterm!!
Super fast and very responsive when emailing or contacting them, the research products are absolutely amazing!
Always quick and helpful
Straight forward purchase, delivered a couple days later. I even emailed the team for a small enquiry and the support response was very prompt and direct to the point