That doesn't exist. Maybe some foods are similar to laxatives and look like negative calorie foods, but in fact, it makes you harm your health instead of losing weight healthily.

If you want to lose weight, you'd better work hard in the following aspects: 1. Work and rest rules; 2. Exercise for 30 minutes every day to 1 hour; 3. The diet is diversified, but you should eat 70% to 80% full every meal; 4. Get in touch with people who can control themselves well and subtly eliminate many bad habits, especially in health; 5. Stay happy and cultivate all kinds of healthy and relaxing hobbies.

If it feels good, take it!