Is it possible to draw conclusions about an adult's physical condition on the basis of their age? The answer is: "It depends." On the one hand, it is well known that the body's ability to function ...

A new research paper was published in Volume 18 of Aging-US on March 12, 2026, titled "Blood biochemical and gut microbiotic ...

(Figure8Photos/Getty Images) The passage of time may be linear, but the course of human aging is not. Rather than a gradual transition, your life staggers and lurches through the rapid growth of ...

The blood system changes over time: a subset of stem cells outcompete their neighbors and gradually take over blood production. In addition, the blood stem cell reservoir shrinks and becomes dominated ...

Doctors explain.

Why do some people live longer than others? New research from the University of Minnesota and Duke University, recently ...

Deep within your bone marrow, a specialized set of stem cells is busy pumping out new blood cells to sustain your body. As we age, these hematopoietic stem cells (or HSCs) become less productive, ...