When most consumers think about aging, they think about skin. Contrary to popular belief, however, hair also ages. The visible sign of aging hair is lack of pigment, which is a result of hair follicles no longer producing melanin.1 Accompanying this decrease in pigment is a decrease in hair strength and thickness. Although there is no way to prevent hair from becoming gray and thin, there may be a way to slow the process by which it happens. To slow hair aging, researchers are turning to an ingredient that has been formulated into personal care products for quite some time—silicone.