My thinking being, if I shoot for 0, then the incidental carbs I get will be well under the cap. When I researched it, the magic number seemed to be between 20-35, but I know if I allowed myself 35, it would probably translate to 50+. Basically, I eat real spartan. It's all protein and veggies...nothing else. But, I'm not discriminating in my veggies, so if I get 5g of carbs because I love roasted eggplant, then so be it.