Lexar product

IGF-1 LR3 (Long R3)

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$109.00
$142.00
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This batch of IGF-1 LR3 (Long R3) Peptide has been third-party laboratory tested and verified for quality and consistency. Manufactured under controlled conditions, it is prepared to support reliable use within research environments.

Research Use Notice: This product is intended strictly for research and laboratory use only. Not for human consumption, medical use, or diagnostic purposes.

Contents: IGF-1 LR3 (Long R3 Peptide Compound)
Form: Lyophilized Powder
Purity: 99.02% (0.1mg) / 99.03% (1mg)
Grade: Research Grade
Storage: Store in a cool, dry environment under proper laboratory conditions
Handling: Follow standard laboratory safety protocols

Nothing hidden

Compound profile

Every component, identified. Sequences and identifiers are taken from PubChem and UniProt, so you can check each one yourself.

  • 01 / 01 Component

    IGF-1 LR3

    Long R3 IGF-I

    Recombinant IGF-I analogue · 83 amino acids

    Changes vs IGF-I
    Glu3→Arg · 13-residue N-terminal extension
    Status
    Research reagent

    An engineered analogue of insulin-like growth factor I with an arginine at position 3 and an N-terminal extension, which lower its binding to IGF-binding proteins. It is widely used as a cell-culture reagent.

99.02%HPLC purity

Lot IGF0002 Labeled 0.1mg Measured 0.13mg Tested Aug 3, 2026

Open certificate (PDF)
99.03%HPLC purity

Lot IGF0001 Labeled 1mg Measured 1.03mg Tested Aug 3, 2026

Open certificate (PDF)

Each strength is produced and tested as its own lot, with its own signed certificate. Only dedicated-sample (V0) values are shown: the 1mg certificate has no two-sample table, and the 0.1mg conformity values could not be reconciled. PubChem has no compound record for Long R3 IGF-I, so no formula, molecular weight or CAS number is shown here.

Published research

What the research covers

Short summaries of peer-reviewed literature on IGF-1 LR3: laboratory, animal and clinical research and reviews. Shown for reference only.

  • Protein design01 / 03

    Design of Long R3 variants

    A 1996 Growth Factors paper describes the design and characterisation of Long R3 IGF-I muteins, including their resistance to pepsin digestion.

  • Cell culture02 / 03

    Binding-protein interaction

    A 2004 study in L6 myogenic cells compared how IGF-binding protein 3 affects IGF-I and Long R3 IGF-I in cell proliferation and differentiation.

  • Animal model03 / 03

    Guinea pig infusion study

    A 1995 Journal of Endocrinology study reports organ and plasma IGF measurements in guinea pigs given Long R3 IGF-I.

Full study index · PubMed (3) 1996 · Protein design Design and characterisation of long-R3-insulin-like growth factor-I muteins which show resistance to pepsin digestion.
Bryant KJ et al. · Growth Factors
PMID 8919033
2004 · Cell culture Effect of recombinant porcine IGFBP-3 on IGF-I and long-R3-IGF-I-stimulated proliferation and differentiation of L6 myogenic cells.
Xi G et al. · J Cell Physiol
PMID 15254966
1995 · Animal model 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.
Conlon MA et al. · J Endocrinol
PMID 7561636
VERIFIED TEST RESULTS

Every batch, independently verified.

Open the signed certificate assigned to this product for its batch-specific laboratory report.

CRL Laboratories ISO/IEC 17025:2017 Accredited
CERTIFICATE OF ANALYSIS
99.02%
PURITY BY HPLC
LOT IGF0002
TESTED Aug 3, 2026
LABELED 0.1mg
MEASURED 0.13mg
FULL QC PANEL
2 laboratory reports
Appearance Visual
Good REPORTED
Sample Matrix Reported in CoA
Lyophilized REPORTED
Purity HPLC
99.02% REPORTED
Net Peptide Content HPLC
0.13mg REPORTED
Identity Reported in CoA
Confirmed REPORTED
Fentanyl Screen Reported in CoA
Not Detected REPORTED
Heavy Metals Reported in CoA
Not Detected REPORTED
Sterility Reported in CoA
No Growth REPORTED
Endotoxin Reported in CoA
NMT 0.05 EU/mL REPORTED

Every batch on record.

2 certificates are assigned to this product.

IGF-1 LR3 (Long R3) · 0.1mg LATEST
LOT IGF0002
99.02% Signed laboratory certificate
COA #COA-2026-A96LO
Labeled0.1mg
Measured0.13mg
IdentityConfirmed
Heavy metalsNot Detected
SterilityNo Growth
EndotoxinNMT 0.05 EU/mL
TestedAug 3, 2026
IGF-1 LR3 (Long R3) · 1mg
LOT IGF0001
99.03% Signed laboratory certificate
COA #COA-2026-A42HB
Labeled1mg
Measured1.03mg
IdentityConfirmed
Heavy metalsNot Detected
SterilityNo Growth
EndotoxinNMT 0.05 EU/mL
TestedAug 3, 2026

Why Lexar

Lexar vs. a typical supplier

What you can check for yourself before you order, using the certificate published for this exact lot.

What to check Lexar Canada Typical supplier
Certificate matched to lot Lexar Canada: COA number tied to the vial lotCOA-2026-A96LO · CRL LaboratoriesCOA-2026-A42HB · CRL Laboratories Typical supplier: One generic certificate reused across batches
Purity of this lot Lexar Canada: Published per lot, by HPLC99.02% · lot IGF000299.03% · lot IGF0001 Typical supplier: A purity claim with no lot reference
Fill accuracy Lexar Canada: Measured mass in the vial0.1mg labeled → 0.13mg measured1mg labeled → 1.03mg measured Typical supplier: Label claim only
Lab accreditation Lexar Canada: ISO/IEC 17025:2017 accredited lab Typical supplier: In-house or unnamed lab
Contaminant screening Lexar Canada: Fentanyl, heavy metals, sterility, endotoxin Typical supplier: Purity only, if anything
Signed & downloadable Lexar Canada: Signed PDF on every product page Typical supplier: Screenshot, or “available on request”
When something goes wrong Lexar Canada: Free replacement, keep the original Typical supplier: Return shipping at your cost

“Typical supplier” describes common practice in the research-peptide market, not any named company.

Read the full certificate

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Delivery

From our shelf to your door

Tracked delivery to Canadian addresses, in plain packaging.

  1. 01 · Order

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  2. 02 · Dispatch

    Packed in 0–2 business days

    Sealed vial, plain outer packaging, no product branding on the box.

  3. 03 · In transit

    Tracked across Canada

    Tracking follows once the order leaves us. Standard delivery is an estimated 3–5 business days.

  4. 04 · Delivered

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  • Free standard shipping over $100
  • Overnight and 2-day options at checkout
  • Canadian addresses only
  • Plain packaging

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Contact us through chat support within 30 days of delivery with your order number, what went wrong and clear photos. Approved requests get a free replacement, and you keep the original item.

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customer feedback

Customer reviews

143 reviews
4.8
★ ★ ★ ★ ★

based on 143 reviews

5 ★ 125
4 ★ 12
3 ★ 3
2 ★ 1
1 ★ 2
★ ★ ★ ★ ★

Vials arrived cold-packed and sealed. Labels are clean, batch number matches the paperwork.

Daniel M.
★ ★ ★ ★ ★

Ordered Tuesday night, plain brown box at my door in Ottawa by Friday morning. No branding anywhere.

Chris R.
★ ★ ★ ★ ★

The buy 2 get 1 applied itself in the cart exactly like the banner says. Watched the third one appear on its own.

Michael T.
★ ★ ★ ★ ★

Third order now. Same packaging, same speed, same quality every time. That consistency is why I stay.

Sarah K.
★ ★ ★ ★ ★

Was skeptical about ordering this kind of thing online but the whole process felt legit from cart to doorstep.

James P.
★ ★ ★ ★ ★

Customer support actually answered at 11pm on a Sunday. A real person, fixed my address typo in two minutes.

Ryan S.
★ ★ ★ ★ ★

Everything came bubble-wrapped with the vials in a foam insert. Nothing rattling around.

Melissa D.
★ ★ ★ ★ ★

Prices are right on the page, no games at checkout. Total matched to the cent.

Kevin B.
★ ★ ★ ★ ★

My GHK-Cu came with proper labeling and an intact seal. Exactly what the photos show.

Matthew H.
★ ★ ★ ★ ★

Fast. Like, faster than my usual pharmacy fast.

Jason C.
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Research use & disclaimers

  1. This product is intended strictly for research and laboratory use only. Not for human consumption, medical use, or diagnostic purposes.
  2. Research summaries describe published laboratory and animal studies. They are not claims about the effects of this product and are not medical advice.
  3. Compound identifiers (sequence, formula, molecular weight, CAS) are reference values from PubChem and UniProt. Batch values come from the certificate of analysis, which relates only to the lot tested.
  4. Comparisons describe common practice in the research-peptide market and do not refer to any named company.