Aging is a major risk factor for many chronic diseases. Figuring out what influences longevity and how to identify rapid agers could lead to healthier and longer lives for more people.

Researchers have found a marker in the brain that indicates vulnerability to developing post-traumatic stress disorder.

People don’t all age at the same rate. Untangling the factors that influence health and disease – such as epigenetics, demographics and behavior – could lead to better care for those who need it most.

A new blood test that identifies progression of osteoarthritis in the knee is more accurate than current methods.

A new technique can measure thousands of molecules from a single drop of blood. The blood can even be collected at home.

A new test needs only a blood sample to detect a novel marker of Alzheimer's disease neurodegeneration, researchers report.

Low levels of ergothioneine, a diet-derived compound in blood plasma, may help identify older adults at risk of developing dementia.

The shape of certain proteins in spinal fluid may be a sign of Parkinson's disease, according to new research.

College students who reported recent thoughts of suicide have different bacteria in their saliva than those who didn't, a new study shows.

A new blood test could complement standard methods for lung cancer screening without the need for biopsy, researchers report.