IGF-1 LR3 (Insulin-Like Growth Factor-1 Long R3)

What is IGF-1 LR3?

IGF-1 LR3 is a peptide. A peptide is a very small protein. IGF-1 is short for Insulin-Like Growth Factor-1.

The body makes IGF-1 in the liver when growth hormone (GH) is present. This version is made in a lab.

LR3 stands for Long R3, a change to the build. That change gives it a half-life of 20 to 30 hours, up from about 20 minutes.

What researchers study it for

• IGF-1 receptor activation. Labs study how it switches on the IGF-1 receptor.
• Binding protein blocking. Studies look at how it slips past IGF binding proteins.
• Muscle cell counts. Researchers count muscle cells, a change they call hyperplasia.
• Dose ranges in protocols. Notes list 20 to 100 mcg a day for 4 to 6 weeks.

What you get

One sealed glass vial of white powder. Each vial holds 1 mg of IGF-1 LR3. Mix the powder with liquid before use. Notes pair it with growth hormone (GH) in a stack.

How to store it

Keep the sealed vial cold, in a fridge, away from light. Once mixed with liquid, keep it cold and use it within a few weeks.

Words you might not know

• Peptide — a very small protein, made of amino acids joined in a chain.
• Receptor — a docking point on a cell where a signal attaches.
• Half-life — the time it takes for half a dose to leave the body.
• Hyperplasia — a rise in the number of cells, not in their size.
• mcg — microgram, a unit of weight. One thousand mcg make 1 mg.
• Vial — a small glass bottle with a rubber top.

Sold for laboratory research only. Not for human consumption.