Autoimmune diseases disproportionately affect the lives of women. They’re also among the top 10 causes of death for women under 65. A new discovery that may finally solve the connection has also revealed a shocking reason they’ve been so hard to diagnose…

You might feel fatigued after a long day of activities or a long night of poor sleep. But if daily fatigue is your constant companion, the cause may be a condition that’s zapping your energy or a vitamin deficiency — or both.

Autoimmune disease turns your body’s once-balanced immune system into an overactive nightmare that begins attacking your own healthy cells and organs. Even with medication, many can be hard to manage. But an ancient spice may be what the doctor orders to improve your treatment plan…

Multiple sclerosis is a debilitating autoimmune disease that attacks the central nervous system. As more people are diagnosed, the current therapy isn’t cutting it. But research into a common supplement ingredient shows it may be possible to restore function in some patients…

Experts have long believed the thymus gland, which produces all the immune-boosting T cells the body needs during childhood, was of little use once we got older. Turns out they weren’t just wrong, they were dead wrong — as in “double the risk of death” wrong.

Chronic fatigue syndrome has puzzled doctors for decades. People with the debilitating condition have felt left out in the cold and worse, told “it’s all in their head.” But several recent studies have found that low blood levels of an important nutrient may be to blame…