● IGF-1 LR3Growth factor

IGF-1 LR3 price comparison

IGF-1 LR3 (Long-R3 insulin-like growth factor-1) is an 83-amino-acid analog of human IGF-1, modified by an arginine substitution at position 3 and a 13-residue N-terminal extension that reduce its binding to IGF-binding proteins. It is a research peptide studied in laboratory and cell-culture models of growth-factor signaling, cell proliferation, and receptor biology. This index tracks research-use-only (RUO) vendor pricing for IGF-1 LR3 so researchers can compare cost across suppliers.

cheapest (first-party)

$48.00/mg

median

$79.00

highest

$145.00

spread

3×

first-party vendors

Fair-price band · 7 first-party vendors · $/mg

median $79.00

$48.00cheapest $145.00highest

The priciest vendor charges 3× the cheapest — buying blind on IGF-1 LR3 can cost up to $97.00/mg more.

first-party prices captured 50m ago

● IGF-1 LR3 · first-party live prices first-party · live 7 listings

#	Vendor	Product	Size	Price	$/mg	Code
1	S1 Research	IGF-1 LR3 1mg first-party · captured 51m ago · earns pepmg $0 · source ↗	1mg	$48.00	$48.00	—	buy →
2	AMC-Essentials	IGF1-LR3 (1mg) first-party · captured 52m ago · earns pepmg $0 · source ↗	1mg	$59.99	$59.99	—	buy →
3	Happy Peptides	IGF-1 LR3 first-party · captured 51m ago · earns pepmg $0 · source ↗	1mg	$72.00	$72.00	—	buy →
4	Ageless Vitality Peptides	IGF-1 LR3 1mg first-party · captured 51m ago · earns pepmg $0 · source ↗	1mg	$79.00	$79.00	—	buy →
5	Pinnacle Peptide Labs	IGF-1 LR3 [1mg] first-party · captured 50m ago · earns pepmg $0 · source ↗	1mg	$79.99	$79.99	—	buy →
6	Sports Technology Labs	IGF-1 LR3 1 mg first-party · captured 50m ago · earns pepmg $0 · source ↗ · COA ↗	1mg	$129.99	$129.99	—	buy →
7	Biotech Peptides	Receptor Grade IGF-1 LR3 (1mg) first-party · captured 50m ago · earns pepmg $0 · source ↗	1mg	$145.00	$145.00	—	buy →

COA availability: 1 of 7 vendors selling IGF-1 LR3 publish a COA : Sports Technology Labs. What a COA proves →

● IGF-1 LR3 blends & stacks · 1 first-party priced by total — not $/mg

Vendor	Blend	Price
AMC-Essentials	IGF1-LR3 (1mg) / Hexarelin (5mg) BLEND	$87.99	buy →

Multi-peptide products (e.g. BPC-157 + TB-500). We don't rank these by $/mg — a per-milligram figure across different peptides isn't comparable — so they're listed separately by total price and kept out of the headline index above.

▸ Why compare $/mg for IGF-1 LR3?

Per-mg pricing for IGF-1 LR3 varies widely because vendors differ in synthesis or recombinant expression method, stated purity, vial fill size, and lot testing rigor. Comparing normalized $/mg across suppliers helps a researcher weigh cost against documented quality rather than paying a premium for equivalent material.

▸ Reading the COA

For IGF-1 LR3, confirm identity by mass spectrometry against the expected mass of roughly 9.1 kDa for the 83-residue analog, and check that the sequence reflects the Arg3 substitution and the N-terminal extension rather than native IGF-1. Look for an HPLC purity figure (commonly >=95-98%) and scrutinize the impurity profile for truncated or misfolded species and deamidation products, since incorrect disulfide folding can yield material that fails functional or identity verification despite having the same nominal mass. A legitimate COA is lot-specific and should also state endotoxin and, ideally, residual solvent or counterion content.

▸ FAQ

How should lyophilized IGF-1 LR3 be stored as a research material?

As a research material, lyophilized IGF-1 LR3 is generally kept sealed and desiccated at -20 C or colder, protected from light and moisture, where it is typically stable for extended periods. Because it is a peptide, repeated freeze-thaw cycles and prolonged exposure to room temperature after reconstitution can degrade it, which is why many labs aliquot reconstituted material to minimize cycling. Follow the specific storage conditions listed on the vendor's COA for the exact lot.

What is a COA and what should I check for on one for IGF-1 LR3?

A Certificate of Analysis (COA) is a lot-specific document reporting the analytical testing a vendor performed on the material you are buying. For IGF-1 LR3, check that mass-spectrometry data match the expected mass for the Long-R3 analog, that HPLC purity is stated with an impurity profile, and that the lot number, quantity, and storage conditions are documented. It verifies the identity and purity of the material, not any biological outcome.

Why do per-mg prices for IGF-1 LR3 differ so much between vendors?

Differences come from production route (solid-phase synthesis versus recombinant expression), stated purity grade, the depth of analytical testing (mass spec, HPLC, endotoxin), vial fill size, and packaging or handling overhead. Larger fills often lower the effective $/mg, while more extensively characterized lots may cost more. Comparing normalized $/mg alongside each vendor's COA makes these trade-offs visible.

▸ Same cluster

PT-141	$3.00/mg
Selank	$2.70/mg
Semax	$2.12/mg
DSIP	$3.20/mg
Kisspeptin	$4.00/mg
Thymosin Alpha-1	$4.50/mg

→ Reconstitution calculator for IGF-1 LR3 research math.

All products listed are sold by third-party vendors for laboratory and research use only (RUO). pepmg sells nothing, ships nothing, and gives no medical, dosing, or human-use guidance. Listings are price-tracking data, not endorsements.