Cortisol resistance, often stemming from chronic stress, hinders the body's response to this vital hormone, despite normal or elevated levels. Key signs include increased belly fat, persistent fatigue ...

The symptom specialists are drawing attention to is linked to vitamin D deficiency. While fatigue, low mood, or frequent ...

Although winter is coming to a close, cold and flu season is still threatening our immune systems. Staying healthy is a marriage of several simple practices, according to Dr. Roger Seheult, a critical ...

Maintaining a balanced diet has never been more important, doctors say. A few months into the coronavirus pandemic, in July, Dr. Elizabeth Klodas, a preventative cardiologist and the owner of Step One ...

High sugar intake has been shown to suppress immune function. Candy, pastries, sodas, and other sugary treats can impair the activity of white blood cells, which are critical for fighting infections.

Here’s what sepsis is, what causes it and how it’s treated if it affects you or someone you love.

WASHINGTON (AP) — U.S. health regulators have authorized an extra dose of the Pfizer or Moderna COVID-19 vaccines in people with weakened immune systems to better protect them from the virus. The ...