No one diet is suitable for all

Are we finally learning that the real answer to optimal health is to choose a variety of all foods in the right balance? — TNS

This is how old I am: A few decades ago, I sat in on a nutrition debate between Dr Dean Ornish and Dr Robert Atkins, both well-known cardiologists with polar opposite views on the best diet to lose weight and prevent heart disease.

Each doctor was passionate about his diet plan, although the diets were/are in hard contrast to each other.