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What is IGF-1 LR3?

IGF-1 is polypeptide long-chain amino acid peptide hormone. Insulin-like Growth Factor (Long-R3 IGF-1), an 83 amino acid analog of IGF-1 is a highly anabolic hormone released primarily in the liver with the stimulus of growth hormone (HGH).


IGF-1 is a peptide molecule and is about the same size and structure as insulin. IGF hormone analogs are known as growth factor polypeptide hormones. In the body, IGF-1 is released in the presence of Human Growth Hormone and functions to promote nitrogen retention and increases in protein synthesis. Growth peptides cause a direct effect on muscles in the body by actual development of fresh muscle fibers and cells.


Many believe in the value of using IGF to promote muscle building. It is thought that it anything it does not cause the loss of muscle. It is often used in addition to other therapy by bodybuilders to enhance exercise potential and improve physique.



The most important feature of IGF-1 is its ability to cause hyperplasia in the human body. The body of a person who is on steroids goes through hypertrophy, this means that they will only be increasing the size of the existing cells in their muscles. On the other hand, IGF-1 leads to hyperplasia which purports the growth and development of new cells in the muscles. Generally, you will accomplish much more in terms of muscle density and size at a normal genetic level.

In other words, the weight gain that you will experience from the use of IGF-1 is not due to retention of water. The weight gain is caused by actual muscle growth and is a long term effect. As compared to steroids which can cause water retention and adverse side effects the weight gain from Insulin-like Growth Factors is from solid muscle gain.