Growth Hormone Secretagogues

IGF-1 LR3

Also known as: Long R3 IGF-1

IGF-1 LR3 is an 83-amino-acid modified IGF-1 analog with a 13-residue N-terminal extension (MFPAMPLSSLFVN) and an Arg-3 substitution. These modifications reduce binding to IGF binding proteins (IGFBPs), extending effective half-life and increasing tissue bioavailability relative to native IGF-1. It is a research/cell-culture reagent and is NOT FDA-approved for any human use. Do not confuse with mecasermin (Increlex), which is recombinant human IGF-1 and IS FDA-approved for severe primary IGF-1 deficiency.

Vendors carrying IGF-1 LR3

0 listings, ranked by trust score

Each row is a (vendor, peptide) pair. Click through for the listing detail, the vendor's full trust profile, and any COAs they've published.

No vendors carrying this peptide are indexed yet.

Independent evidence

COAs for IGF-1 LR3

23 third-party tests across 10 vendors. Each card links to the full report.

All 23 COAs for IGF-1 LR3 →
99.95 %
Apr 2026
Biogenica Labs · HPLC

For

IGF-1 LR3

by Amino Club· batch IGF0001

99.16 %
Mar 2026
Freedom Diagnostics · HPLC

For

IGF-1 LR3

by Peptide Supply Co.· batch GLR31031026

98.87 %
Feb 2026
Vanguard Laboratory · HPLC

For

IGF-1 LR3

by Mile High Compounds· batch IGF-001-MH-02

99.06 %
Jan 2026
Janoshik Analytical · HPLC

For

IGF-1 LR3

by Skye Peptides· batch IGF25-1-003

99.08 %
Dec 2025
Freedom Diagnostics · HPLC

For

IGF-LR3

by Simple Peptide· batch IGFR12172025-J

96.27 %
Nov 2025
Janoshik Analytical · HPLC

For

IGF-1 LR3

by ZLZ peptides· batch cmojgromn00539grxzzwqeri4

97.45 %
Sep 2025
Freedom Diagnostics · HPLC

For

IGF-LR3

by Simple Peptide· batch IGLR09222025-J

99.36 %
Sep 2025
Janoshik Analytical · HPLC

For

IGF-1 LR3

by Profound Aminos· batch cmojb86a401h8kirxvxbas7o4

99.79 %
Aug 2025
Janoshik Analytical · HPLC

For

IGF-1 LR3

by Verified Peptides· batch 09-25-0301C

99.52 %
Aug 2025
Janoshik Analytical · HPLC

For

IGF-1 LR3

by Hydro Research Peptides· batch HYD-IGFLR3-2508-02

97.18 %
Jul 2025
Freedom Diagnostics · HPLC

For

IGF-1 LR3

by Simple Peptide· batch IGFLR301072025-J

98.21 %
May 2025
Freedom Diagnostics · HPLC

For

IGF-LR3

by Simple Peptide· batch 2530301

99.54 %
May 2025
Janoshik Analytical · HPLC

For

IGF-1 LR3

by Skye Peptides· batch IGF25-1-001

99.71 %
Feb 2025
Janoshik Analytical · HPLC

For

IGF-1 LR-3

by Verified Peptides· batch 10-24-0201B

99.16 %
Sep 2024
Janoshik Analytical · HPLC

For

IGF-1 LR3

by Verified Peptides· batch 08-24-0101A

99.92 %
Jul 2024
Janoshik Analytical · HPLC

For

IGF-1 LR3

by Peptide Tech· batch I3-001

Feb 2026

Purity not on file

Janoshik Analytical

For

IGF-LR3

by Skye Peptides· batch IGF26-01-001

Feb 2026

Purity not on file

Janoshik Analytical

For

IGF-LR3

by Skye Peptides· batch IGF26-01-001

Jan 2026

Purity not on file

Janoshik Analytical

For

IGF LR3

by Skye Peptides· batch IGF25-1-003

Jan 2026

Purity not on file

Janoshik Analytical

For

IGF LR3

by Skye Peptides· batch IGF25-1-003

Aug 2025

Purity not on file

Janoshik Analytical

For

IGF-1 LR3

by Verified Peptides· batch 09-25-0301C

May 2025

Purity not on file

Janoshik Analytical

For

IGF-LR3

by Skye Peptides· batch IGF25-1-001

Feb 2025

Purity not on file

Janoshik Analytical

For

IGF-1 LR3

by Verified Peptides· batch 10-24-0201B