As I mention in the intro, Harriet is so good at what she does because of her attitude towards how much she knows, "not enough".
Like all great coaches, they have to continue learning and have the attitude that they will never know everything and they must continue to get better at their craft to be better at getting the desired result.
Harriet is an expert dietician with a great deal of experience now with guiding people through the steps to take to affirm a healthy lifestyle long term.