IGF-1 LR3

Regulatory & access status

IGF-1 LR3 is not approved by the FDA for any use; products sold under this name are labeled for research use only, not for human consumption.

Sellers that market unapproved peptides for human use can receive FDA warning letters; our vendor directory links any letter we found on fda.gov.

How much research exists on IGF-1 LR3?

IGF-1 LR3 has no reliable PubMed search term of its own (the name is shared with unrelated terms), so we list only papers whose titles name it. Search PubMed.

Most relevant recent papers

• Recombinant expression of IGF-1 and LR3 IGF-1 fused with xylanase in Pichia pastoris. — Appl Microbiol Biotechnol, 2023
• Detection of His-tagged Long-R³-IGF-I in a black market product. — Growth Horm IGF Res, 2010
• Attenuated glucose-stimulated insulin secretion during an acute IGF-1 LR3 infusion into fetal sheep does not persist in isolated islets. — J Dev Orig Health Dis, 2023
• The somatotropic axis in neonatal calves can be modulated by nutrition, growth hormone, and Long-R3-IGF-I. — Am J Physiol, 1997
• Long R3 insulin-like growth factor-I (IGF-I) infusion stimulates organ growth but reduces plasma IGF-I, IGF-II and IGF binding protein concentrations in the guinea pig. — J Endocrinol, 1995

What the evidence does not show

• Paper counts measure research attention, not whether IGF-1 LR3 works or is safe.
• No clinical trial in humans is tagged in PubMed under this name.
• No FDA review of any "research use only" product's identity, purity, sterility or dose.

Research suppliers that list IGF-1 LR3

31 vendors in our directory listed a product matching IGF-1 LR3 in their public catalog on October 19, 2026. Listed alphabetically; a listing is not an endorsement. Research use only.

• Atomik LabzCatalog item: “BULK PACK IGF-LR3 – 1mg (10 VIALS)”
• BioGenix PeptidesCatalog item: “IGF-1LR3 1mg”
• Biotech PeptidesCatalog item: “Receptor Grade IGF-1 LR3 (100mcg)”
• Bulk Peptide SupplyCatalog item: “IGF-1-LR3 1 mg”
• Core PeptidesCatalog item: “Receptor Grade IGF-1 LR3 – 100MCG”
• Dynamic PeptideCatalog item: “IGF-1 LR3 1mg”
• Eros PeptidesCatalog item: “IGF-1 LR3 1MG”
• Evolve BioPepCatalog item: “IGF-1 LR3 1mg”
• Extreme PeptidesCatalog item: “IGF-1 LR3”
• Ion PeptideCatalog item: “IGF-LR3 – 1mg”
• Liberty PeptidesCatalog item: “IGF-1 LR3 (1mg)”
• Licensed PeptidesCatalog item: “IGF-1 LR3”
• Modern AminosCatalog item: “IGF-1 LR3 1MG”
• NuScience PeptidesCatalog item: “IGF-1 LR3 – 1mg”
• Paramount PeptidesCatalog item: “IGF-1 LR3 (1mg)”
• Peptide CraftersCatalog item: “IGF-1 LR3 (1mg)”
• Peptide WorldwideCatalog item: “IGF-1 LR3 (Insulin-Like Growth Factor-I Long Release 3) – 1MG per vial”
• Pharma Grade PeptidesCatalog item: “IGF1-LR3 1MG”
• Polaris PeptidesCatalog item: “IGF1-LR3 1mg”
• ProtideHealthCatalog item: “IGF-1 LR3 1mg”
• Pure Lab PeptidesCatalog item: “IGF-1 LR3 1mg”
• Ramp PeptidesCatalog item: “IGF-1LR3”
• Royal PeptidesCatalog item: “IGF-1 LR3 1mg”
• San Diego PeptidesCatalog item: “IGF-1 LR3”
• Southern AminosCatalog item: “IGF-1 LR3 1MG”
• Sports Technology LabsCatalog item: “IGF-1 LR3 1 mg”
• Sunrise BioResearchCatalog item: “IGF-1 LR3 1mg x 10vials, 10mg”
• Swiss ChemsCatalog item: “IGF-1 LR3 1mg”
• Verified PeptidesCatalog item: “IGF-1 LR3 Peptide (1MG)”
• Voltera SciencesCatalog item: “IGF- LR3 1MG”
• Xcel PeptidesCatalog item: “IGF-1 LR3”

Prices per mg, where we could verify them, are on our price comparison.

IGF-1 LR3 reconstitution math

Lab arithmetic only, not dosing guidance: vial-by-vial concentration tables are on IGF-1 LR3 1 mg vial math.

IGF-1 LR3 FAQ

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