Not for human consumption

IGF-1 LR3 Peptide — Long Arginine Insulin-Like Growth Factor | Research Grade

Original price was: $ 90.00.Current price is: $ 70.00. - or subscribe and save up to 10%

IGF-1 LR3 is an 83-amino-acid analog of insulin-like growth factor-1 with a Long Arg3 modification that increases circulating half-life by reducing binding to IGFBP proteins.

Research-grade specs

Sequence length: 83 amino acids
Class: IGF-1 analog (Long Arg3 variant)
Half-life: ~20-30 hours (vs ~10 minutes for native IGF-1)
Mechanism: IGF-1R agonist, reduced IGFBP binding

Studied applications

IGF-1 signaling and IGF-1R receptor research
Anabolic and tissue-growth studies
Aging and somatopause research
Comparative insulin/IGF-1 receptor research

Quality & trust

≥99% HPLC purity, third-party tested
Mass spectrometry identity confirmation
LAL endotoxin testing on every batch
Batch-specific Certificate of Analysis included
USA same-day shipping (orders before 2pm CT M-F)

Related research: Sermorelin · CJC-1295 + Ipamorelin

Research literature

IGF-1 Long Arg3 has been the subject of 16 peer-reviewed publications indexed in PubMed. Selected recent literature for research reference:

Li X et al. (2004). Integration of hydrogen/deuterium exchange and cyanylation-based methodology for conformational studies of cystinyl proteins. Anal Biochem. PMID: 15246005
Shoubridge CA et al. (2003). Preferential intestinal delivery of long[Arg3] insulin-like growth factor (LR3IGF-I) over IGF-I in preweaning and adult rats. Endocrinology. PMID: 12697696
Khamsi F et al. (2001). Differential effects of insulin-like growth factor-I and gonadotropins on the proliferative activity of two subgroups of granulosa cells: cumulus oophorus and mural granulosa cells. Fertil Steril. PMID: 11334915
Laajoki LG et al. (2000). Solution structure and backbone dynamics of long-[Arg(3)]insulin-like growth factor-I. J Biol Chem. PMID: 10744677
Yang Y et al. (1999). Probing the folding pathways of long R(3) insulin-like growth factor-I (LR(3)IGF-I) and IGF-I via capture and identification of disulfide intermediates by cyanylation methodology and mass spectrometry. J Biol Chem. PMID: 10608814

References are provided for research reference only. Inclusion of literature does not constitute a recommendation, endorsement, or claim for any specific use of LiveWell Peptides products. Products are sold for laboratory and research use only and are not intended for human consumption, injection, topical application, or any other administration to the human body.

Quantity	Price	Discount
3-5	$ 67.20	4%
6-8	$ 64.40	8%
10-15	$ 62.30	11%
16+	$ 70.00	$ 0.00

Add $ 200.00 to cart and get free shipping!

Description

IGF-1LR3

IGF-1 LR3 (Insulin-like Growth Factor-1 Long R3) is a synthetic peptide hormone used primarily in bodybuilding and performance enhancement.

Here are key points about it:

Structure:
Modified version of IGF-1 LR3 with an extended half-life (20-30 hours) due to an arginine substitution at position 3 and a 13-amino acid extension at the N-terminus.

Function:
Promotes muscle growth (hypertrophy) and repair by stimulating protein synthesis and cell proliferation.

Benefits:

Enhances muscle mass and strength.
Improves recovery from intense exercise.
May support fat loss by increasing metabolism.
Potentially aids in injury healing (e.g., tendons, ligaments).

{
“@context”: “https://schema.org”,
“@type”: “Product”,
“name”: “IGF-1 LR3 | Research Grade”,
“image”: “https://www.livewellpeptides.com/wp-content/uploads/2025/12/product-08.png”,
“description”: “IGF-1 LR3 is a long-acting analog of Insulin-like Growth Factor 1 studied in cellular growth pathway research. 99%+ purity, ccGMP manufactured in Dallas, TX. For in-vitro laboratory research only.”,
“sku”: “LWP-IGF1LR3”,
“mpn”: “IGF1-LR3”,
“brand”: {“@type”: “Brand”, “name”: “LiveWell Peptides”},
“manufacturer”: {“@type”: “Organization”, “name”: “LiveWell Peptides”, “url”: “https://www.livewellpeptides.com/”},
“category”: “Research Peptides”,
“offers”: {
“@type”: “Offer”,
“url”: “https://www.livewellpeptides.com/product/igf-1lr3/”,
“priceCurrency”: “USD”,
“price”: “70.00”,
“priceValidUntil”: “2026-12-31”,
“availability”: “https://schema.org/InStock”,
“itemCondition”: “https://schema.org/NewCondition”,
“seller”: {“@type”: “Organization”, “name”: “LiveWell Peptides”}
}
}

Research Use Only Disclaimer: This product is sold strictly for in vitro laboratory research. NOT for human or animal consumption. LiveWell Peptides makes no medical claims.

Why Researchers Choose LiveWell Peptides for IGF-1 LR3 Peptide

LiveWell Peptides is recognized as the best peptide company 2026 and a trusted peptide vendor for laboratories and independent researchers across the United States and internationally. Every batch of IGF-1 LR3 Peptide ships with a verified certificate of analysis (COA), confirming identity, purity, and sterility — because transparency is non-negotiable when sourcing research peptides free shipping USA.

As a cGMP peptide manufacturer headquartered in Dallas, Texas, LiveWell maintains pharmaceutical-grade quality controls that rival any compounding pharmacy alternative peptides supplier. Whether you are building a peptide stack for research, exploring anti-aging peptides buy online, or investigating peptides for bodybuilding research, our catalog delivers the cheapest research peptides with COA without sacrificing quality.

Since Peptide Sciences shut down, researchers ask: “peptide sciences shut down where to buy?” — LiveWell Peptides is the answer. As a peptide supplier with certificate of analysis, we are the go-to Peptide Sciences alternative trusted by the research community. Searching for peptides near me, an ozempic alternative natural, or simply looking to buy peptides online USA? LiveWell ships fast with free domestic shipping — plus international shipping to Colombia, Mexico, Brazil, Argentina, Chile, and Peru.

LiveWell Peptides review: “Exceptional purity, fast shipping, and real COAs. Best research peptide source available.” — Verified Researcher

Disclaimer: This product is sold strictly for laboratory and research use only. Not for human consumption. No medical claims are made or implied. Researchers are responsible for compliance with all applicable local, state, and federal regulations.

Péptidos de Investigación — LiveWell Peptides

LiveWell Peptides es su proveedor de péptidos Estados Unidos de confianza para comprar péptidos de investigación de la más alta calidad. Cada lote de IGF-1 LR3 Peptide incluye péptidos con certificado de análisis que garantiza pureza e identidad verificadas. Como la mejor empresa de péptidos 2026 y la principal alternativa a Peptide Sciences, ofrecemos péptidos cGMP fabricados en USA con estándares farmacéuticos.

Nuestros péptidos de alta pureza con COA están disponibles para comprar IGF-1 LR3 Peptide online con envío internacional de péptidos a toda Latinoamérica. Realizamos envío a Colombia, México, Argentina, Chile, Perú y Brasil — ideales para péptidos para investigación científica en universidades y laboratorios de todo el continente.

Aviso: Este producto se vende exclusivamente para uso en investigación y laboratorio. No apto para consumo humano.

Frequently Asked Questions

What is IGF-1 LR3 studied for in research?

IGF-1 LR3 is a peptide studied in cell-growth and recovery research. LiveWell IGF-1 LR3 is intended strictly for laboratory research use only.

What purity is LiveWell IGF-1 LR3, and is there a COA?

Every batch of LiveWell IGF-1 LR3 is third-party tested and ships with a Certificate of Analysis (COA), typically 99%+ purity by HPLC. COAs are available on request.

Is IGF-1 LR3 a drug or supplement?

No. IGF-1 LR3 is a research compound sold for laboratory and research use only. It is not a drug, dietary supplement, or product intended for human or animal consumption.