IGF-1 LR3 100mcg (Receptor Grade)

Buy IGF-1 LR3 100mcg here at Biotech Peptides: an IGF-1 analog in a 100mcg vial, sealed and freeze-dried. It’s in stock at $27, with free shipping worldwide on every order. Our label says it plainly: synthesized and lyophilized in the USA. The lot paperwork (COA, HPLC trace and mass spectrum) is in the product images.

About IGF-1 LR3

IGF-1 LR3 is an 83-amino-acid analog of IGF-1 with an arginine swap at position 3 and a 13-amino-acid extension. Those changes stop it binding IGF binding proteins, so it stays active much longer.

It’s widely used in cell culture media.

What studies report about IGF-1 LR3

It was developed for cell culture in the 1990s.

In cell culture it’s several times more potent than IGF-1.

The full list of IGF-1 LR3 papers is on PubMed, and most abstracts are free to read.

How IGF-1 LR3 works

IGF-1 is the hormone that carries out much of growth hormone’s effect on cells. Most of it in the body is bound by IGF binding proteins, which hold it inactive.

LR3 has an arginine in place of glutamate at position 3 plus a 13-residue extension. Binding proteins barely recognize it, so it stays free and active far longer. That’s why it’s the standard IGF-1 in cell culture media.

IGF-1 LR3 100mcg product details

• Compound: IGF-1 LR3
• Other names: Long R3 IGF-1
• CAS number: 946870-92-4
• Molecular formula: C400H625N111O115S9
• Molecular weight: 9,111 g/mol
• Sequence or structure: 83 amino acids
• Amount: 100mcg
• Form: lyophilized (freeze-dried) powder
• Made: synthesized and lyophilized in the USA
• Lot paperwork: COA, HPLC and MS images in the gallery
• SKU: Receptor-Grade-IGF-1-LR3-100mcg

Lot testing for IGF-1 LR3 100mcg

We show the paperwork instead of describing it. Open the gallery and you’ll find the COA with its lot number and test table, an HPLC trace for purity and a mass spec plot for identity.

If you need the PDF for a lab notebook or an ethics file, send us the order number and we’ll email it.

Reconstituting IGF-1 LR3 100mcg

The concentration is the 100mcg in the vial divided by the water you add:

• 1mL of water: 100mcg per mL
• 2mL of water: 50mcg per mL

Use sterile bacteriostatic water and add it slowly, aiming at the glass instead of the powder. A gentle swirl is all it needs.

Store sealed vials in the freezer. Once you’ve added water, keep the vial at 2 to 8°C and plan to finish it within roughly a month.

Planning a study with IGF-1 LR3 100mcg

Count the total milligrams across every group and time point, and round up. Running out halfway and switching lots adds a variable you didn’t plan for.

Compare IGF-1 LR3 listings

• IGF-1 LR3 100mcg (Receptor Grade) (this page): $27, $270 per mg
• IGF-1 LR3 1mg (Receptor Grade): $145, $145 per mg

Choose by how much material the project needs. Per milligram, the larger amount is the better deal.

IGF-1 LR3 compared with similar peptides

IGF-1 LR3 is an 83-amino-acid IGF-1 analog that avoids binding proteins and lasts for hours. The compounds it’s usually weighed against:

• MGF is the E-domain peptide from the muscle-specific IGF-1 splice variant
• PEG-MGF is MGF with a PEG chain added so it lasts much longer
• ACE-031 is a decoy activin receptor that soaks up myostatin
• Follistatin-344 binds myostatin and activin directly

Muscle research uses two routes: the IGF-1 side (IGF-1 LR3 and the MGF peptides) and the myostatin side (ACE-031 and follistatin). All of them are on our muscle peptides page.

Related muscle peptides

• MGF 5mg (Mechano Growth Factor), an IGF-1 splice variant peptide
• PEG-MGF 5mg, a pegylated MGF
• ACE-031 1mg, a soluble activin receptor fusion protein
• Follistatin-344 1mg, an activin-binding glycoprotein

The full range is on the research peptides page. For this research area, go to muscle peptides and growth hormone peptides.

Buying IGF-1 LR3 100mcg from Biotech Peptides

We sell research peptides and nothing else, close to 90 of them, so questions about IGF-1 LR3 100mcg reach people who handle these products every day. Orders are packed from stock, and every listing shows its real price No membership, no minimum order.

If something arrives damaged or isn’t what you ordered, tell us soon after delivery. Photos of the parcel and the vial make it quicker to sort out.

Shipping IGF-1 LR3 100mcg worldwide

We don’t charge for shipping, wherever the parcel is going. Freeze-dried material is fine at room temperature for the trip; put it in the freezer when it arrives.

Every product is listed in our shop, and the Biotech Peptides Shop home page links to the blog’s country-by-country delivery guides.

Common questions about IGF-1 LR3 100mcg

How much does shipping cost?

Nothing. Shipping is free on every order worldwide.

What do I reconstitute IGF-1 LR3 100mcg with?

Sterile bacteriostatic water. The mixing section above lists concentrations for common volumes.

How should IGF-1 LR3 100mcg be stored?

Frozen at -20°C while dry. After mixing, in the fridge at 2 to 8°C, used within about four weeks.

Does IGF-1 LR3 100mcg come with a COA?

Yes. The certificate of analysis, HPLC trace and mass spectrum for the lot are in the product images.

Is IGF-1 LR3 100mcg in stock?

Yes, it’s in stock today.

Buy IGF-1 LR3 100mcg online today

Ready to order? It is $27 and ships free. Use the cart button at the top of the page.

Other products for the same work are in the muscle peptides and growth hormone peptides section.

For laboratory research only. Not for human or veterinary use, and not evaluated by the FDA.