Verified
Great documentation
Everything about this feels professional - from the site to the packaging to the paperwork. Purity assay matches what is on the label. Will keep ordering.
Isabella G.Lisbon, PT · 19 May 2026
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Peptides
Growth Research
In stockIGF-1 LR3
HPLC purity 97.2% · View certificate ↗1 mg · ≥99% purity
4.9
Long-R3 insulin-like growth factor 1 research peptide.
£45.99GBP
£45.99 per vial · Tax calculated at checkout · Free tracked UK & EU shipping over £50
Bundle & saveVolume discount applied automatically
1
We accept
≥99% purity
3rd-party HPLC
CoA per batch
Fast UK shipping
Quality guarantee
Every batch is independently HPLC assayed. Certificate of Analysis available on request.
Every UK order includes — free
- ✓Batch certificate of analysis (HPLC)
- ✓Discreet, unbranded packaging
- ✓Tracked delivery — free on orders over £50
Full refund
if a batch is off-spec
Free reship
if lost or damaged in transit
Same-day dispatch
Mon–Fri, order before 12:00 UK
Research use only
for laboratory work
Analytical data
Specifications, documented.
Identity data cross-checked against PubChem; purity taken from the batch certificate of analysis.
CompoundIGF-1 LR3
Also known asLong R3 insulin-like growth factor-1 · 83 aa
Purity (HPLC)97.2% — batch certificate of analysis
FormLyophilised powder, sealed glass vial
SolubilityBacteriostatic or sterile water
Storage−20 °C lyophilised, protected from light
About this compound
IGF-1 LR3
Long R3 insulin-like growth factor 1
First disclosed
1993
IGF-1 LR3 is a modified form of insulin-like growth factor 1 carrying a 13-residue N-terminal extension and an Arg³ substitution. Both changes lower its affinity for IGF-binding proteins, so it stays active longer in culture — which is why it is a common reference ligand in IGF-pathway studies.
Binds the IGF-1 receptor with reduced IGFBP sequestration; studied in vitro for IGF-1R signalling and cell-proliferation pathways.
Research areas
IGF-1 receptor signallingCell-proliferation assaysGrowth-factor models
Research literature
Research notice: supplied strictly as laboratory research material for in-vitro use. Not for human or veterinary use, and not a medicine, food or cosmetic. This page gives identification and quality information only — no usage instructions or medical advice.
Browse this research area
IGF-1 LR3 is a long-arg3 analogue of insulin-like growth factor 1, supplied by MyPeptides for laboratory research use only.
IGF-1 LR3 is a long-arg3 analogue of insulin-like growth factor 1. MyPeptides supplies it as a lyophilised 1 mg vial for in vitro laboratory research, HPLC assayed at ≥99% purity with a signed certificate of analysis on every batch.
Researchers reach for IGF-1 LR3 in cell-culture, growth and receptor-signalling research. It is offered strictly for laboratory investigation — no personal-use claims, no dosing guidance, and no framing as a medicine.
The point of buying research grade rather than generic material is documentation. Every IGF-1 LR3 order carries lot-specific HPLC and mass-spec data, so the compound in your protocol matches the compound named on the paperwork. LR3 modification reduces IGFBP binding, making it a common lab-standard IGF-1 form.
IGF-1 LR3 — frequently asked questions
Straight answers on purity, handling, dispatch and research use.
What is IGF-1 LR3?
IGF-1 LR3 is a long-arg3 analogue of insulin-like growth factor 1, supplied by MyPeptides as a lyophilised research vial for laboratory research use only.
What is IGF-1 LR3 used for in research?
In cited literature, IGF-1 LR3 is studied in cell-culture, growth and receptor-signalling research. It is not a medicine and is not intended for human or veterinary use.
What purity is MyPeptides IGF-1 LR3?
Every batch is third-party HPLC assayed at ≥99% purity. A signed certificate of analysis is available on request after checkout.
How is IGF-1 LR3 reconstituted and stored?
Ships lyophilised in a sealed borosilicate vial. Store at −20 °C; reconstitute with bacteriostatic or sterile water immediately before in vitro use.
Do you ship IGF-1 LR3 to the UK and EU?
Yes — tracked Royal Mail and DPD dispatch across the UK and EU, with free shipping on orders over £50. Weekday orders placed before 12:00 UK time ship the same day.
IGF-1 LR3 reviews
Verified feedback from qualified researchers across the UK & EU.
4.7(6 reviews)
Swipe
Verified
Great documentation
Everything about this feels professional - from the site to the packaging to the paperwork. Purity assay matches what is on the label. Will keep ordering.
Isabella G.Lisbon, PT · 19 May 2026
Professional service end to end
Really impressed with the packaging quality. Everything double-boxed, insulated and clearly labelled. Same day dispatch worked as promised.
Ravi M.Birmingham, UK · 23 May 2026
Verified
Consistent batch to batch
Ordered late Monday, arrived Wednesday morning in the UK. Packaging was cold-protected and every vial sealed correctly. CoA matched the batch number on the label.
Sofia R.Madrid, ES · 20 Mar 2026
Trust these guys
Support answered a batch question within a few hours over email. Rare to get that level of response from a research supplier. Product itself is exactly to spec.
Anton V.Vienna, AT · 12 Jun 2026
Verified
Vials in perfect condition
Third order from MyPeptides. Purity and appearance are consistent across batches. The paperwork is genuinely useful - mass, structure and CAS all included.
Mia L.Stockholm, SE · 15 May 2026
Verified
Reference-grade quality
Documentation is what sold me. Independent CoA per batch, clean HPLC traces. Reconstitution behaved exactly as expected. Solid supplier for research use.
Amelia S.Edinburgh, UK · 26 Mar 2026
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