Eating sweet potatoes alone will lead to malnutrition, and it is impossible to lose weight. In fact, to lose weight, as long as you jog or walk at the speed of crossing the street for 30 minutes every morning for breakfast and lunch, from two hours after dinner to the next meal, and from two hours after dinner to bedtime. Try to eat less dinner. Don't eat too much for the other two meals. It is best to feel hungry 30 minutes before the next meal (be sure to feel hungry) 10. Stick to it and you can lose weight.