The main reason for globulin's presence in the body is its role in various physiological functions. Globulins are a diverse group of proteins that serve functions such as supporting the immune system by producing antibodies (gamma globulins), transporting substances in the blood (alpha and beta globulins), and contributing to blood clotting (fibrinogen). Additionally, globulins play a role in maintaining osmotic pressure and regulating enzyme activity. The production and regulation of globulins occur in different organs and tissues of the body, including the liver and immune cells.