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…

Evidence keeps stacking up that the gut microbiome plays a strong role in MS. And recent findings reveal systems that may be manipulated for new treatments, perhaps with supplements that promote protective bacteria — without the side effects of medications.

Selma Blair and Christina Applegate are part of a trend, but not a popular one. Autoimmune diseases are on the rise in people aged 50 and older. While scientists examine why, one possible reason is a common medication. Another isn’t so easy to avoid…

The human body is amazing. But a lot of little things can go wrong. Some are annoying, like rashes, while others, like fatigue, can wreak havoc with our daily lives. Many of these mishaps are set off by a poorly functioning immune system. Here’s how to know if yours is in trouble…

If you’re living with an autoimmune disease, you’re probably focused on keeping it under control. But you should know heart disease could be just around the corner. Autoimmune problems that posed the highest heart risk included these four…