A Long Island hospital is using a new blood test that could change how doctors evaluate certain head injuries, while saving patients time and money. CBS News New York's John Dias reports.

Researchers have discovered that a simple blood test may reveal powerful clues about longevity and overall health, potentially changing how doctors assess aging and disease risk.

But here's why you likely won't be seeing it in your doctor's office anytime soon.

Experts in the US found that higher levels of a protein called p-tau217 were an accurate predictor of people developing cognitive problems and dementia.

Scientists develop a blood test that detects Alzheimer’s by measuring protein structural changes rather than protein quantity.

Women with higher levels of p-tau217, a blood protein, were twice as likely to eventually develop dementia or mild cognitive impairment.

Their makers claim they can detect dozens of cancer types — but some scientists say they could be missing many cancers or ...

Early detection tests are already on the market, but without FDA approval or proof they reduce deaths some doctors urge ...