I'm not sure that I can say it's perfect (or healthiest) or not, but I know a couple of things for sure: My vitamin and mineral consumption during OWL is better than it has ever been in my life.

Before I was eating enriched breads and cereals, because they were 'good' for me with some veggies and protein thrown in for good measure. Now I eat whole foods: meats, cheeses, vegetables, berries and nuts. On almost any given day I can fall short of a few vitamins and minerals--but short by very little, and am now never short of fiber.

Basically, the only things that are in grain products and a lot of fruits are sugar, plain and simple. My body does not respond well at all to sugar--it does respond well to this way of eating. So perhaps for me, this is the healthiest route.