While there are no magical fruits that can guarantee fast fat burning, some fruits can be beneficial for weight loss and fat burning due to their nutrient content and low calorie density. Here are some examples:

1. Berries: Berries are low in calories and high in fiber, which can help you feel full and reduce your overall calorie intake. They are also rich in antioxidants, which can help reduce inflammation and oxidative stress in the body.

2. Grapefruit : Grapefruit is low in calories and high in fiber, which can help you feel full and reduce your overall calorie intake. It also contains compounds that can help regulate insulin levels and promote fat burning.

3. Avocado : While technically a fruit, avocado is high in healthy fats and fiber, which can help you feel full and satisfied. It also contains compounds that can help regulate blood sugar levels and promote fat burning.

4. Apples: Apples are low in calories and high in fiber, which can help you feel full and reduce your overall calorie intake. They also contain compounds that can help regulate blood sugar levels and promote fat burning.

5. Pears: Pears are low in calories and high in fiber, which can help you feel full and reduce your overall calorie intake. They also contain compounds that can help regulate blood sugar levels and promote fat burning.

It's important to remember that while these fruits can be beneficial for weight loss and fat burning, they are just one small part of a healthy diet. Eating a variety of nutrient-dense foods, staying hydrated, and engaging in regular physical activity are all important for achieving and maintaining a healthy weight.