Over time, it has become clear that changes in stem cells do occur during aging, not only in their number but also in their relationship to their microenvironment and their functionality as reflected in changes to their metabolome.  Stem Cells and Aging: Methods and Protocols brings together chapters from expert contributors with protocols critical for exploring the biology of stem cell aging, all of which is key for understanding these age-related stem cell changes at a basic biology level and at the level of their impacts for regenerative medicine.  Written in the highly successful Methods in Molecular Biology™ series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible protocols, and tips on troubleshooting and avoiding known pitfalls.