IGF-1 LR3 1mg (Receptor Grade)

Buy IGF-1 LR3 1mg here at Biotech Peptides: an IGF-1 analog in a 1mg vial, sealed and freeze-dried. The price is $145, it’s in stock, and shipping is free to any country we deliver to. Our label says it plainly: synthesized and lyophilized in the USA. Scroll the product images to see the lot’s certificate of analysis.

IGF-1 LR3 at a glance

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.

IGF-1 LR3 in published research

It was developed for cell culture in the 1990s.

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

For the primary literature, PubMed lists the IGF-1 LR3 studies.

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 1mg 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: 1mg
• Form: lyophilized (freeze-dried) powder
• Made: synthesized and lyophilized in the USA
• Lot paperwork: COA, HPLC and MS images in the gallery
• SKU: IGF-1-LR3-1mg

Lot testing for IGF-1 LR3 1mg

Three documents sit in the image gallery. The certificate of analysis lists the lot number, sequence, storage temperature and the test results. The HPLC chromatogram is the purity test, and the mass spectrum confirms the molecular weight.

Want a copy for your records? Contact us with your order number and we’ll send the file.

How to mix IGF-1 LR3 1mg

The concentration is the 1mg in the vial divided by the water you add:

• 1mL of water: 1mg per mL
• 2mL of water: 0.5mg per mL

Bring the vial to room temperature, add sterile bacteriostatic water against the glass and swirl gently. It should go clear within a minute or two. Shaking only makes foam.

Dry vials last longest frozen at -20°C. Reconstituted solution goes in the fridge and is best used within four weeks or so.

How many vials of IGF-1 LR3 1mg to order

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

These are the IGF-1 LR3 options we carry. Price per milligram drops as the amount goes up.

Where IGF-1 LR3 fits

IGF-1 LR3 is an 83-amino-acid IGF-1 analog that avoids binding proteins and lasts for hours. If you’re choosing between options, these are the usual alternatives:

• 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.

Often ordered with IGF-1 LR3 1mg

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

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

IGF-1 LR3 1mg from a store that sells peptides only

Our catalog is narrow on purpose: research peptides, blends and cosmetic peptide powders. That keeps stock moving, so the vial you order isn’t one that has been sitting on a shelf for a year.

Problems with an order go through the contact page. Include the order number and a photo of anything damaged.

Shipping IGF-1 LR3 1mg 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 1mg

How much does shipping cost?

Nothing. Shipping is free on every order worldwide.

What do I reconstitute IGF-1 LR3 1mg with?

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

How should IGF-1 LR3 1mg 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 1mg 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 1mg in stock?

Yes, it’s in stock today.

Order IGF-1 LR3 1mg from Biotech Peptides

Ready to order? It is $145 and ships free. Use the cart button at the top of the page.

Add other compounds from our muscle peptides and growth hormone peptides to the same parcel.

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