Several years ago, author B. A. Smit's health decided to go on a long walk. Its destination is unknown, but it is still walking. She noticed that she did not feel well after eating, so she started to investigate the complex relationship between the foods she ate eat and the way she felt. She started a series of experiments with her own diet and saw immediate improvement when she removed common culprits such as gluten, dairy, yeast, sugars and soy from her food choices. But as liberating as this information was, she was bored with the limited choices these restrictions presented. As a true...