For a high cost—and sometimes a biological sample—some entrepreneurs promise to build our very own, individualized nutrition plan, according to our unique body chemistry. Wow. Sounds great! Right? Well … not so fast. According to this linked article from the Center for Science in the Public Interest, much of the success of these personal services may be the result of following the zero cost advice of standard dietary guidelines: reduce added sugar and refined grains … and eat more fruits and vegetables.