What kind of weight loss method without taking medicine is the most effective and healthy?

Now I only exercise. I used to be fat. 120. Now I have lost dozens of pounds, all because of exercise and diet control. After general exercise, you can't enter anything including water for about 2 hours, otherwise you will lose all your efforts. I have been losing weight for several years, only this year I work hardest. I exercise almost every day, and I exercise most of the time. If you want to lose weight, you have to work hard and never use diet pills. The only thing harmful to your health is exercise.