New research pinpoints the mechanism through which sleep helps boost the activity of immune cells, thereby enhancing the body’s immune response.

As more people use e-cigarettes, debates about their safety continue. For now, NHS England and Scotland conclude that smoking tobacco does more harm.

A new study investigates how marijuana smoking can affect the quality of sperm. Its findings contradict the researchers’ initial hypothesis.

A new study links prolonged sitting while viewing TV to a higher risk of young-onset colorectal cancer, regardless of obesity and exercise.