Best Place to Buy IGF-1 LR3 in 2026

Short answer: Amino Club (Bureau Score 4.8), the Bureau's first choice for IGF-1 LR3. Below is why, the three alternatives worth knowing, and what to check before any order. IGF-1 LR3 is sold by these stores for laboratory research use only, not for human use.

What to know before buying IGF-1 LR3

IGF-1 LR3 (Long R3 IGF-I) is an 83 amino acid analogue of human IGF-1: arginine replaces the glutamic acid at position 3 and a 13 amino acid N-terminal extension is added, which lowers binding to IGF binding proteins and gives it a longer half-life and higher potency than native IGF-1. It was designed for mammalian cell culture, where it is used as a growth supplement, and is studied in muscle and cell growth research.

IGF-1 LR3 is not an approved drug; the FDA approved IGF-1 medicine is mecasermin (Increlex, approved 30 August 2005), which is native human IGF-1, not LR3. The World Anti-Doping Agency's 2026 Prohibited List bans IGF-1 and its analogues at all times under S2.3.

• What to match on the certificate: IGF-1 LR3 is a small protein, so the certificate should show a mass of about 9.1 kDa (83 residues; reference material from cell culture suppliers is made in E. coli and sold as a non-glycosylated chain), not the mass of a short peptide. Look for HPLC purity, a mass spec identity result near 9.1 kDa, and the same lot number as the vial.
• Vial sizes: It is sold in 0.1 mg and 1 mg vials, so its price per mg looks huge next to other compounds (1 mg vials read 1 Nov 2026 ran from about $70 to $135); compare the price of the same vial size, and do not mix it up with DES IGF-1 or MGF, which are different peptides.
• What it costs: 6 stores the Bureau reviews list IGF-1 LR3; on 1 November 2026 the in-stock list prices ran from $69.99 per mg (Amino Club, 1 mg vial) to $134.99 per mg (Sports Technology Labs, 1 mg vial), before any code.
• Storage: Cell culture suppliers state the lyophilized protein is stored at -20 C, and once reconstituted at 2 to 8 C for up to one week, or aliquoted and frozen at -20 C for longer, avoiding repeated freeze and thaw.

The alternatives

Each one stocks IGF-1 LR3 and has been through the Bureau's vendor review. Listed in the Bureau's own vendor order, not by price.

Side by side

Prices are list prices for single vials, read from each store by the Bureau's Vendor Watch on 1 November 2026, before any code. Prices change daily.

How the Bureau picks

The pick is the vendor at the top of the Bureau's vendor list that stocks IGF-1 LR3. Scores come from the scorecard, which weighs lab documentation, consistency, shipping and price, and a vendor cannot buy a score. Before any order, match the lot number on the vial to a certificate from a named third-party lab. More in the vendor scorecard and the IGF-1 LR3 guide.

Where-to-buy guides for other compounds, built the same way: 5-Amino-1MQ, AOD-9604, ARA-290, BPC-157, CJC-1295 and Ipamorelin, Cagrilintide, DSIP, Epitalon, GHK-Cu, GHRP-6, Ipamorelin, KPV, Kisspeptin, LL-37, MOTS-c, Melanotan 2, NAD+, PT-141 (Bremelanotide), Pinealon, SS-31, Selank, Semaglutide, Semax, Sermorelin, TB-500, Tesamorelin, Thymosin Alpha-1, VIP.

Frequently asked questions

Where is the best place to buy IGF-1 LR3?

The Bureau pick is Amino Club (Bureau Score 4.8). Batch COA on every product page from an 8-assay panel at an ISO 17025 lab. Alternatives that stock it: NextgenPeps, Limitless Biotech, PSPeptides.

Is there a discount code for IGF-1 LR3?

Reader deals checked by the Bureau: Amino Club, Code 100: 20% off; NextgenPeps, Code PEPTIDEBUREAU: 10% off; PSPeptides, Code PEPTIDEBUREAU: 10% off.

How do I check a IGF-1 LR3 vendor before ordering?

Match the batch or lot number on the vial to a certificate from a named third-party lab, check the test date, and look for identity (mass spec) as well as purity (HPLC). The Bureau's scorecard records which vendors do this.

Why is IGF-1 LR3 so expensive per mg?

Because it is sold in tiny vials, 0.1 mg or 1 mg, and it is a 9.1 kDa protein rather than a short peptide. Compare stores on the price of the same vial size, not on price per mg against other compounds.

Is IGF-1 LR3 banned in sport?

Yes. The World Anti-Doping Agency's 2026 Prohibited List bans insulin-like growth factor 1 and its analogues, at all times, under S2.3.

Sources

• Ilex Life Sciences, LR3 IGF-I Human, E. coli Recombinant Protein, product data sheet (07.2023), read 1 November 2026
• ScienCell, Recombinant Human Long R3 Insulin-like Growth Factor-1 (storage), read 1 November 2026
• openFDA Drugs@FDA search for mecasermin, read 1 November 2026
• WADA 2026 Prohibited List (copy of the official text, S2.3), read 1 November 2026
• WADA Prohibited List (official page), read 1 November 2026

Peptide Bureau earns a commission on orders placed through the buttons on this page, at no extra cost to you. Reader codes were checked on each vendor's cart; offer terms are the vendor's and can change. See disclosures.