IGF-1, also known as somatomedin C, is one of the members of the peptide family, which has structure & size similar to insulin and is released into the liver or in peripheral tissues in response to the growth hormone to make new muscles. It is responsible for the anabolic activities of GH, and builds new muscle by promoting water retention and protein synthesis. It doesn't only make muscle fibers larger, but also increase them in number.

IGF-1 has powerful effect on fat metabolism and helps the body to burn fat quickly. IGF-1 also helps in stimulating and enhancing the bone density and muscle movements. It has anti-aging chemicals in it, and it is considered as a central regulator for increasing lifespan. It helps to increase the growth and strength of muscles. Thus, IGF-1 decreases the recovery period after injury, and alleviates pain, swelling, stiffness associated with arthritis.

IGF-1 also helps to improve mental functions such as reflexes and learning ability. It is indeed a neuroprotector as well as a neuropromoter, which helps the brain functions to work properly such as memory, reflexes and learning abilities. It also helps to decrease cholesterol, boost energy levels, enhance sexual well-being and performance, and reduce the risks of heart attacks and strokes.

However, IGF-1 has very short life. Thus, Long R3IGF-1 or IGF-1 LR3, which has longer life, is commonly used. IGF-1 LR3 remains active for hours, and saves the users from the headache of using IGF-1 frequently. IGF-1 LR3 is available in lyophilized powder form or already reconstituted form. IGF-1 LR3 is manufactured by Guangxi Tanghan Zinc & Indium Co., Ltd.

IGF-1 LR3 is very popular among muscle builders, but it is not recommended for inexperienced bodybuilders. IGF-1 LR3 doses range from 20mcg up to 120mcg. Often a dose of 80mcg a day for 4 weeks is prescribed. The initial starting dosage is 20-40 mcg. The drug is approved by FDA for use under doctor's prescription.

However, it's important to take anabolic steroid for a long period of time, before starting IGF-1 LR3. It is also important to evaluate the hypoglycaemic effects that it produces. Starting IGF-1 LR3 without any prior use of anabolic steroids, can cause several side effect, such as - cancer, accelerated growth of tumors and enlargement of intestinal organs. IGF-1 LR3 can also cause some adverse side effects, such as severe headache, nausea, and possible hypoglycaemia. So, IGF-1 LR3 is not recommended for the people with a history of cancer.