This fully updated book collects protocols that reflect current investigations into how stem cell populations change during organismal aging. These methodologies are well-established and described in easy to follow fashion so as to be valuable for not only experts but novices in the ever-developing stem cell field. Written for the highly successful Methods in Molecular Biology series, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Authoritative and up-to-date, Stem Cells and Aging: Methods and Protocols, Second Edition serves as an ideal guide for all researchers working in this very active area of study.