The latest innovation in skincare, skin growth factor, is the basis of Cytokines Top Ten Fluid Cell Renewal Complex. The term comes from Greek: cyto, for cell and kinesia, for movement. By stimulating cell renewal, it repairs your skin and leaves it firmer and more youthful in appearance. In addition, this fluid contains skin growth factor in its most concentrated form - 15 percent. The high amount allows for deep penetration and optimum results. 1.0 oz