Is there a correlation between your awareness of your stress and its damage?

There’s a TED talk by Kelly McGonigal about how to “make stress your friend.” She showed a epidemiological study where they discovered that if you predict or say that stress is detrimental for your health, you’re in the worst position. So it’s not stress that makes you sick, but knowing that you’re stressed. But ultimately, at the end of the day, it’s about both appraisal and dealing with the situation.