For many people, living longer brings health challenges: Osteoporosis, diabetes, Alzheimer’s disease. And of course, zombie cells. The technical term is senescent cells. They’re damaged and unable to ...

Natural killer cells act as the immune system’s rapid-response team, but the stress of anxiety and insomnia may be quietly thinning their ranks. A study of young women in Saudi Arabia found that both ...

Red blood cells transport oxygen throughout your body, including to vital organs and tissues. They also help your body get rid of carbon dioxide. Too little or too many red blood cells may be ...