Insulin-like Growth Factor (IGF) is similar to insulin in that it is a hormone that helps regulate metabolism and growth in the body. IGF is a peptide hormone, similar to insulin, that is produced in the liver and is responsible for the growth of bones, muscles, and other tissues. IGF also helps to regulate the metabolism of glucose, just like insulin does. In addition, IGF has similar effects on cell growth and proliferation, as well as on the activation of enzymes and other proteins. Therefore, IGF is similar to insulin in many ways, making it an important hormone in the body.