The body does just fine with periods of fasting. Frankly, the whole food pyramid, low fat/high carbs, you name it crap that these people have been putting out for years is just that...crap.
You want to eat healthy? Eat like we were designed to eat. Eat food that comes from the earth, in as minimally processed form as possible. Fasts won't bother you and likely help to regulate hormones. Humankind survived just fine with long fasting periods
We've made tremendous advances in so many health related areas, but diet is one that had undeniably regressed.