Thymosins, the latest volume in the Vitamins and Hormones series, first published in 1943, and the longest-running serial published by Academic Press, provides up-to-date information on thymosins research that spans new data from molecular biology to the clinic. Each volume can focus on a single molecule or a disease that is related to vitamins or hormones, with the topic broadly interprested to include related substances, such as transmitters, cytokines, growth factors, and others reviewed.