Running extreme distances may strain more than just muscles and joints. New research suggests ultramarathons can alter red blood cells in ways that make them less flexible and more prone to breakdown, ...

Tiny brain bleeds become more common as people grow older and are linked to memory problems, stroke, and dementia. For many ...

A new study from Gladstone Institutes shows red blood cells act as hidden glucose sponges in low-oxygen conditions, explaining why people living at high altitude have lower diabetes rates and pointing ...

Dear Dr. Roach: I had an eye issue last year that led to blood tests resulting in an elevated A1C. I said that it wasn't my blood; I am plant-based, exercise regularly, and don't drink sodas or ...

Scientists have long been puzzled by how maturing red blood cells manage to produce all the hemoglobin they need to carry oxygen to tissues, even after shedding the vital structures they need to ...

Scientists have long known that people living at high altitudes, where oxygen levels are low, have lower rates of diabetes than people living closer to sea level. But the mechanism of this protection ...