Pursuant of a "healthy" diet is really hard to define. If I told you to take a look at my lunch in the picture, what would you say about it's degree of healthiness? We have two boiled eggs, avocado's on brown bread, some oats with fat free yogurt and one strawberry. All traditionally "healthy" foods but there's always an element of moderation to this label. Let me explain.
Healthy foods can become healthy if not consumed in "healthy" amounts. The body requires a set amount of nutrients each day to function optimally and perform all the tasks which would constitute a healthy body.