Fasting May Help Protect Against Immune-Related Effects of Chemotherapy and Aging (image) Cell Press Share Print E-Mail Caption During fasting the number of hematopoietic stem cells increases but the number of the normally much more abundant white blood cells decreases. In young or healthy mice undergoing multiple fasting/re-feeding cycles, the population of stem cells increases in size although the number of white blood cells remain normal. In mice treated with chemotherapy or in old mice, the cycles of fasting reverse the immunosuppression and immunosenescence, respectively. Credit Cell Stem Cell, Cheng et al. Usage Restrictions Credit Required Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.