IGF-1 LR3 Price Comparison — Best Sources in 2026
IGF-1 LR3 (Long R3 Insulin-like Growth Factor 1) is one of the most researched analogues of native IGF-1, engineered for a longer half-life and reduced binding-protein affinity. Because vial sizes range from 1mg up to 10mg, price per mg swings massively by supplier. This guide ranks every vetted research source we track by live $/mg, factors in stackable coupon codes, and pairs each offer with our independent testing transparency score.
Live IGF-1 LR3 prices by supplier
Sorted by best $/mg after applying default supplier coupons. Updated continuously.
| Supplier | Dosage | Price | $/mg | Testing | Coupon | |
|---|---|---|---|---|---|---|
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See the full IGF-1 LR3 price page for out-of-stock listings, price history charts, and dosage-by-dosage breakdowns.
How to pick the best IGF-1 LR3 source
A $90 vial of 1mg IGF-1 LR3 is dramatically more expensive per mg than a $300 vial of 5mg. Always compare $/mg — our table does it automatically using the supplier's default coupon.
IGF-1 LR3 is a frequent counterfeit target. Demand HPLC purity, mass-spec identification, and endotoxin/sterility reports per batch. Suppliers publishing all four earn the highest testing scores.
Research suppliers run sitewide codes (typically 10–20%) that meaningfully change effective $/mg. We track active coupons per supplier and apply them to displayed price-per-mg automatically.
IGF-1 LR3 is heat-sensitive. Prefer suppliers that ship promptly and refrigerate on arrival. After reconstitution with bacteriostatic water, research stability is typically rated for 2–4 weeks at 2–8°C.
A great $/mg doesn't matter if the vial ships in a month or never arrives. This guide only ranks in-stock offers from suppliers with proven shipping track records.
Look for suppliers shipping factory-sealed lyophilized vials with intact crimps. Loose caps or non-uniform fill levels across a batch are red flags for repackaging.
About IGF-1 LR3
IGF-1 LR3 is a synthetic analogue of human Insulin-like Growth Factor 1, modified with a 13-amino-acid N-terminal extension and an Arg-for-Glu substitution at position 3. Those changes substantially reduce its affinity for IGF binding proteins (IGFBPs), extending circulating half-life from minutes (native IGF-1) to roughly 20–30 hours in research models. IGF-1 LR3 sold by US suppliers is labeled for laboratory research purposes only and is not an FDA-approved product. PeptideMaxxing is an independent comparison site — we do not sell, prescribe, or recommend the use of IGF-1 LR3.
How PeptideMaxxing ranks suppliers
We independently score every supplier across eight testing categories (purity, identification, endotoxins, sterility, heavy metals, conformity, net content, trust) and pull live pricing daily. Affiliate links don't change our ranking — the cheapest legit $/mg always wins.
IGF-1 LR3 price FAQ
What is the cheapest source for IGF-1 LR3?
The cheapest legit source depends on current stock and active coupons. Our live table ranks vetted suppliers by $/mg after coupon, so the cheapest legitimate option is always at the top.
How much does IGF-1 LR3 cost per mg?
Research-grade IGF-1 LR3 typically ranges from roughly $40 to $120 per mg depending on vial size and supplier. Larger 5mg and 10mg vials almost always offer the best $/mg.
What vial sizes are most common?
1mg vials are the default across the industry. Larger 2mg, 5mg, and occasionally 10mg vials offer substantially better $/mg and are worth seeking out when in stock.
How should IGF-1 LR3 be stored?
Lyophilized IGF-1 LR3 should be refrigerated on arrival. Once reconstituted with bacteriostatic water, research stability is typically rated for 2–4 weeks at 2–8°C; long-term storage prefers −20°C.