The best way is to exercise. You can go for a walk with him every day, and you must stick to it. Dad is so thin that he will stick to it in summer. Sweating will make him detoxify at that time, and he should add more water and fruit. After losing weight, he must control his diet, eat less high-sugar and high-calorie foods and eat less fried foods. It is best to exercise, and he will definitely lose weight. Come on ~