IGF-1 LR3
The muscle-growth peptide, done right.
IGF-1 LR3 is one of the most asked-about research peptides for muscle growth and recovery. We prescribe the real thing after a quick medical consult, so you get the right dose safely, not an unregulated vial off the internet.
Free consult first, no pressure. You pay only if our medical team prescribes it for you.
Book a free consultationHow it works
Book a consultation
Start online or in person. It only takes a minute, and the consultation can be done from home.
Meet with a nurse practitioner
They review your health history and your goals, and talk through whether a peptide is a good fit for you.
Get your prescription
If a peptide is appropriate, your provider writes the prescription. If it is not the right choice for you, they will tell you that too.
We get it ready for you
We prepare your prescription so it is ready for your visit. Your card is charged when the prescription is processed.
IDEAL FOR
Is IGF-1 LR3 Right for You?
IGF-1 LR3 is prescribed after a consultation and is one of the more advanced options, so provider guidance matters.
Experienced, training-focused adults pursuing strength and lean mass
People who want structured recovery support
Anyone who prefers close provider oversight on an advanced protocol
A free consultation with our medical team is required to see if it is appropriate for you.
What IGF-1 LR3 Is Studied For
IGF-1 LR3 is a modified version of insulin-like growth factor 1, engineered to stay active in the body longer than the natural form. IGF-1 is one of the main signals through which growth hormone drives tissue growth and repair. Research and clinical interest focus on muscle growth, recovery, and metabolic support. It is a research peptide, prescription-only.
Muscle growth and lean-tissue development
Recovery and repair after training
Metabolic support as part of a broader plan
Strength and body-composition goals
What Is IGF-1 LR3?
IGF-1 LR3 is a modified version of insulin-like growth factor 1, a protein the body produces naturally and which plays a role in growth and tissue development. The “LR3” refers to two changes made to the molecule: a substitution at the third amino acid and a short extension added to one end. Together these changes make it bind less readily to the carrier proteins that normally regulate IGF-1, so it stays active in the body considerably longer than the natural version. The modified form was developed as a reagent for laboratory cell culture rather than as a medicine, and it has not been through human clinical trials. It is not FDA-approved, and it is prohibited in competitive sport by the World Anti-Doping Agency.
FAQ
Click on a question to see more
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What is IGF-1 LR3?
It is a modified form of insulin-like growth factor 1, a protein the body makes naturally. The modifications reduce how much it binds to the carrier proteins that normally regulate IGF-1, which makes it last longer in the body than the natural form.
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Is IGF-1 LR3 FDA-approved?
No. IGF-1 LR3 is not FDA-approved for any use. The modified form was originally developed as a laboratory reagent for cell culture work rather than as a medicine.
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What does the human research show?
There is essentially none. IGF-1 LR3 has not been studied in human clinical trials. What is known about it comes from laboratory work. That is an important thing to understand before considering it, and your provider will discuss it with you directly.
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Is IGF-1 LR3 banned in sport?
Yes. The World Anti-Doping Agency prohibits IGF-1 and its analogs. If you compete in a tested sport, this would cause you to fail a drug test.
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Can I get IGF-1 LR3 at Cienega Medical?
IGF-1 LR3 is available by prescription following a consultation with a nurse practitioner, who will review your health history and whether it is appropriate for you.
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How do I start?
Book a consultation. One of our nurse practitioners will review your health history and goals with you, and if this is appropriate they will write the prescription and we will order it for your visit. Your card is charged when the prescription is processed.
How Much Does IGF-1 LR3 Cost?
Cared for by our 12-person Los Angeles medical team. Meet your provider →
Visit us near you in West Hollywood, Santa Monica, and Calabasas
In-person, physician-supervised care at all three Cienega Medical clinics.
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