Why beans work. And an alternative bean hack, just in case. — In his best selling book The 4-Hour Body Tim Ferriss outlines his Slow Carb Diet. The Slow Carb Diet is basically a Low-Carb diet with some add-ons. One of the add-ons is Beans or Legumes. You are required to eat beans or lentils with every meal. That includes breakfast, lunch, and dinner. The problem is, Tim never says how many beans. In other areas of the diet info (about 60 pages out of…