I often lose weight, but what you said about 20 kg a month is really far-fetched, depending on your physique. If it is all fat, it is easy to lose weight. If I have more muscles, it will be a protracted war. If you can afford diet pills, I suggest you buy some capsules with reasonable prices to suppress your appetite, but I personally think that suppressing your appetite mainly depends on your own wishes. If you can't stand it, buy medicine. I can easily lose ten pounds if I starve to death, but people look particularly miserable. They are thin, but their faces are yellow, they have no spirit at all, and they have acne, which will rebound when they eat. I suggest you take your time. Try to eat less dinner first, and then skip dinner. Exercise, jogging and brisk walking are all effective. I have a friend who was similar to you at first, but she was very determined. She jogs three times in the school playground every morning and pays attention to her diet. She is too thin to recognize. To sum up, it is not difficult to lose weight as long as you can control your mouth. Hee hee, but let me remind you that you said you were going to college soon. If you live on campus, you will get fat easily. First of all, three meals are not bad, because girls generally like to eat together, and it is not appropriate to eat for a long time. There are also girls who like to eat snacks. Look at what their roommates ate. It's estimated that the whole house began to eat at last. So be careful. Well, good luck.