Obstructive sleep apnea induces a metabolic chain reaction that leads to increases in weight and blood sugar levels, among other unhealthy changes.

A dangerously high blood pressure reading for women is 180/120 mmHg or higher. Learn more about the health risks and when to seek emergency care.

Nighttime drops in ocean oxygen raise energy use in small reef fish. Repeated stress could affect reef health as oceans warm.

Subtle changes in how blood flows through the brain and how brain tissue uses oxygen may be closely linked to Alzheimer's ...

Scientists have found that a special component in some people's blood provides them with natural protection against malaria. A recent study has demonstrated that a genetic variant named rs112233623-T ...

Scientists have long known that people living at high altitudes, where oxygen levels are low, have lower rates of diabetes ...

Just over two years into Colorado’s wolf reintroduction effort, 12 of the 25 wolves brought from Oregon and British Columbia have died. Colorado Parks and Wildlife maintains that while the level of ...

The Federal Reserve’s decision on whether to cut interest rates again depends heavily on the uncertain “neutral rate,” the level at which policy neither slows nor stimulates the economy. With rates ...

There are no official numbers for the optimal levels of testosterone, but certain medical laboratories use the following reference values for typical total serum testosterone, measured in nanograms ...