Harvard-trained neuroscientist: Avoid these 3 types of toxic co-workers ‘at all costs’

Most sources of stress are easy to identify — but it’s the unexpected triggers that can harm you the most. 

At work, toxic bosses, co-workers or clients can drive your brain into a stressed-out state, hurting your productivity and eroding your confidence, says Juliette Han, a Harvard-trained neuroscientist.