IGF-1 LR3
A longer-lasting form of IGF-1, studied for muscle growth.
Also listed as Long R3 IGF-1, IGF1 LR3, Insulin-like Growth Factor 1 LR3.
Peptide Compare tracked 46 vendors selling IGF-1 LR3 on 10 Oct 2026. The cheapest in-stock 1.08 mg vial is $20.83 per mg at Bio Pepz, 70% under the $69.99 median. Prices are scraped from vendor sites; trust scores come from Finnrick blind tests.
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Best value right now · 1 mg
Bio Pepz
IN STOCKTRUST 6.5
Per mg70% under the $69.99 median
Vial price1.08 mg · verified Oct 10
Avg per mg · 1 mg
$84.02−52.0%
Ranged $79.36 – $175.70 across 46 vendorsCompare 45 vendors · 1 mg
Across all sizes, verified in-stock listings run $12.00 to $295.00 from 27 vendors.
VendorStock
27
Behemoth LabzUNTESTED · OUT
$13.49$13.49
28
Real PeptidesUNTESTED · OUT
$40.00$40.00
30
SwissChemsTRUST 4.0 · OUT
$59.96$59.96
34
Verified PeptidesUNTESTED · OUT
$65.00$65.00
36
PeptidologyTRUST 7.6 · OUT
$77.40$77.40
38
Solution PeptidesUNTESTED · OUT
$85.00$85.00
39
Pepvida LabsUNTESTED · OUT
$85.00$85.00
40
Umbrella LabsUNTESTED · OUT
$89.99$89.99
44
Risynth BioTRUST 9.1 · OUT
$125.00$125.00
Showing 8 of 45 vendors · 37 more from $13.49/mg
IGF-1 LR3 prices verified Oct 10, 2026
$20.83/mgBio Pepz · $22.50
Buy best priceSee how IGF-1 LR3 moved against the rest of the catalogue in the Peptide Price Index: median price per mg now versus 30 and 90 days ago, every tracked peptide, with a CSV.
IGF-1 LR3 price by vial size
| Vial size | Lowest per mg | Vial price | Vendor |
|---|---|---|---|
| 1 mg | $20.83 | $22.50 | Bio Pepz45 vendors carry it |
| Other | $120.00 | $12.00 | Ruo Bio7 vendors carry it |
Verified 10 Oct 2026. Lowest figures are in-stock listings checked within the last week, with any coupon applied; a size with none says so.
Price movement · 30 days
0%median per mg, all sizes
Cheapest ever recorded: $10.00/mg on Mar 2. Today is 108.3% above that low.See our top-ranked IGF-1 LR3 vendors
Ranked by Finnrick trust score, independent lab testing, and price.
Compare IGF-1 LR3 head-to-head
- IGF-1 LR3 vs Tesamorelin
- IGF-1 LR3 vs Ipamorelin
- IGF-1 LR3 vs CJC-1295 + Ipamorelin
- IGF-1 LR3 vs Sermorelin
- IGF-1 LR3 vs CJC-1295 (No DAC)
- IGF-1 LR3 vs Tesamorelin + Ipamorelin
Quick Summary
A modified form of IGF-1 with an extended N-terminus, studied in cell culture and in livestock. No peer-reviewed human study of it has been published. Available from 46 vendors, priced from $12.00 to $295.00.
Research: The 2026 evidence audit of these compounds (Dominikowski et al, Front Endocrinol, DOI 10.3389/fendo.2026.1822475) rates IGF-1 LR3 as having no peer-reviewed human studies. The half-life and potency multipliers once quoted here have been removed: the 2.5-fold figure belongs to a DIFFERENT compound, des(1-3)IGF-1, in a rat motoneuron study, and one bovine assay found LR3 LESS potent than native IGF-1 at a given dose.
Side effects: No human adverse event table has been published
Research compoundCell culture and livestock data only; not approved for human use
- 37 of 46 vendors currently have it in stock
- Highest-rated vendor: Risynth Bio (9.1 Finnrick score)
- Most common vial size: 1mg
- Category: Growth Hormone — Growth hormone releasing peptides
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