Created in 2002, XEN-TAN revolutionized sunless self-tanner and said goodbye to orangey application and chemical aromas. XEN-TAN’s dedication to the science of self-tan led them to be the first brand to use a time-release agent in their products. The agent controls the amount of DHA (dihydroxyacetone) released on the skin during application. When released too quickly, DHA creates unpleasant odors and the trademark orange finish. XEN-TAN’s time-release process leaves flawless and natural results.