As a wise little six-year-old once said: What the what? It’s already accepted that genomics can help physicians dial-in treatments for cancer and cardiovascular disease. And pharmacogenomics — a field of study that will help physicians choose which meds will benefit you as an individual — is a new “hot thing.” Next up: A growing number of researchers are convinced that knowing more about your genes could help you choose the best diet, the Wall Street Journal reports (paywall).