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IGF-1, also known as somatomedin C, is not an androgenic-anabolic steroid(AAS), but rather a protein hormone(also known as a polypeptide, or peptide–hormone) that is extremely similar in structure to the hormone insulin. IGF-1 is endogenously synthesized by the human body, primarily in the liver. The production of IGF-1 by the liver is stimulated and triggered by human growth hormone(HGH). HGH is essentially a pro-hormone for IGF-1, and the majority of HGH’s anabolic effects are actually the result of the production of IGF-1, which is the primary reason why many athletes buy IGF 1.
Although IGF-1 is molecularly similar to insulin, its role is slightly different. Like insulin, IGF-1 is a hormone that facilitates the transport of nutrients(such as amino acids and glucose) into body cells, including muscle cells. The cells themselves can then utilize those nutrients in order to synthesize new tissue and carry out various body functions. Medically, its use is primarily for the treatment of growth failure, but as IGF-1 is a fairly recent discovery in medicine, its experimental use for the treatment of other conditions continues to broaden. Its medical use and clinical research extends into conditions such as: dwarfism, aging, neuropathy, cancer, and even strokes.
IGF-1 consists of a chain of 70 amino acids in length. By comparison, insulin is composed of 51 amino acids in length. As previously mentioned, IGF-1 is a nutrient-shuttling hormone that is extremely anabolic in adults. IGF-1 production is stimulated by HGH, making HGH a releasing-hormone for IGF-1, hence why increased HGH dosage-effects are limited to how much IGF-1 the liver can produce at any given time. This is where the advantages of exogenous IGF-1 use comes into play. IGF-1, aside from being a nutrient-shuttling hormone, also acts to promote muscle cell hyperplasia(the growth and development of new cells) as opposed to muscle cell hypertrophy (which is the growth of existing cells in size).
Studies have found that 99% of IGF-1 circulating the bloodstream is bound to specific binding proteins, and free(un-bound) IGF-1 is responsible for muscle cell proliferation(hyperplasia). As a result, pharmaceutical research has discovered various methods of modifying the IGF-1 structure in order to circumvent the issue of IGF-1 molecules binding to their respective proteins. The results are different variants of IGF-1 that have been developed for use. IGF-1, regardless of the variant, always works systemically in the body after administration.
IGF-1LR3 is the most common, and most popular variant of IGF-1 on the market, and is what you’ll receive when you buy IGF 1 through PrecisionAnabolics. It contains biologically-identical IGF-1 consisting of the original 70 amino-acid chain, but with an additional 13 amino-acids at its N-terminus, for a total of 83 amino acids. It also possesses a second modification, where an arginine is located at the 3rd position rather than the original glutamic acid. The result of these modifications is that IGF-1 still exhibits its original activity at the IGF-1 receptor in body tissues, and has a very low binding affinity for the IGF binding proteins mentioned earlier. It also exhibits a significantly extended half-life of approximately 20–30 hours, as opposed to IGF-1’s 12–15-hour half-life. All of these factors combined have demonstrated LR3 to be about three times the potency of IGF-1. For maximum results, reconstitute with our bacteriostatic water for sale.