What I've found over my experiences with "nutritionists" are they are full of shit. They hardly ever come out and say whether or not a diet is good or bad, and when they do they do stupid shit (food pyramid anyone?). We know the food pyramid is bullshit, we know that we don't need carbs after a certain part in the day, and we know that the human body does not need carbohydrates in order to live. We cannot live without fats, we cannot live without proteins, but carbohydrates are not necessary. Your body makes ketones to replace them. Why is it that after you eat a ton of "energizing"carbs you feel sluggish and tired? This is because insulin boosts, insulin boosts induces body fat storage, and in this case this is bad. Take a hint from some of the longest living and healthiest races on the planet (hunza, okinawans, etc.) who eat a diet primarily consisting of proteins and healthy fats, and very very little amounts of carbs, they seem to know what they're doing in contrast to the bullshit nutrtionists of obese America telling us that what we're doing is ok, as we keep getting fatter and fatter.