I also added carbs very very slowly in very small portions. I didn't gain a single pound since I started SBD. Maybe you can postpone sweet potatoes for sometime and try whole grains instead. And I know people in USA LOVE peanut butter on everything. But but most consumer-brand peanut butters, even if labeled "natural", contains other ingredients including hydrogenated vegetable oil and dextrose(or other sweeteners). So be careful about eating it.