Question: what is the best diet to lose belly fat quickly?
Answer: Avoid sugar and sugar-sweetened drinks. Foods with added sugars are bad for your health. ... 
Eat more protein. Protein may be the most important macronutrient for weight loss. ... 
Eat fewer carbohydrates. Eating fewer carbs is a very effective way to lose fat. ... 
Eat fiber-rich foods. ... 
Exercise regularly. ... 
Track your food intake.