There is no single level of stress that is optimal for all people. We are all individual creatures with unique requirements.

As such, what is distressing to one may be a joy to another. And even when we agree that a particular event is distressing, we are likely to differ in our physiological and psychological responses to it.

our personal stress requirements and the amount which we can tolerate before we become distressed changes with our ages.

It has been found that most illness is related to unrelieved stress. If you are experiencing stress symptoms, you have gone beyond your optimal stress level; you need to reduce the stress in your life and/or improve your ability to manage it.