We have all heard it: "It's just in your head." When work deadlines pile up, financial worries linger or an unexpected public speaking obligation looms, we often treat anxiety as a purely psychological challenge – something to be overcome with a bit of willpower.

Some experts suggested that stress activates the immune system, causing widespread inflammation

We have all heard it: "It's just in your head." When work deadlines pile up, financial worries linger or an unexpected public speaking obligation looms, we often treat anxiety as…