There is no perfect human food because every human is different. Different cultures around the world have developed different enzymes in their gastro-intestinal track based on their local food. But the gut is a sensitive system. It doesn't take much to throw it off. But what throws mine off, is perfectly fine for my wife. Conversely, things that should cause me grief are digested fine. Western culture gets terrified of chicken juice like its some toxic radio-active acid that will destroy the world. But other cultures prepare it and eat it in way that would make many of us toss our lunch at the throught. Anyway...everybody is different, and constantly changing. You have to pay attention to your body. It will tell you what it needs or can't handle...and in some of us, it screams it.