Best 20 Low-calories Nutrient-dense superfoods;that may help you burn fat quickly:

While it's not possible for any food or fruit to have zero calories (as even the smallest amount of energy is required for our bodies to function), there are several low-calorie options that are nutrient-dense. 

Here's a list of 20 foods and fruits that are low in calories and offer essential nutrients:

1.Cucumber: 

Low in calories and high in water content, cucumbers are refreshing and provide vitamins K and C.

2.Celery:

 Consisting mostly of water, celery is very low in calories and offers dietary fiber, vitamin K, and some antioxidants.

3.Zucchini: 

This versatile vegetable is low in calories, rich in fiber, and a good source of vitamins A and C.

4.Spinach: 

Packed with vitamins A and K, as well as folate, iron, and antioxidants, spinach is a highly nutritious leafy green.

5.Mushrooms: 

Low in calories and fat, mushrooms provide essential minerals, vitamins B, and antioxidants.

6.Asparagus: 

With a low calorie count, asparagus is a good source of folate, vitamins A and C, and dietary fiber.

7.Broccoli: 

High in fiber, vitamins C and K, and various antioxidants, broccoli is a nutritious cruciferous vegetable.

8.Strawberries:

 These juicy berries are relatively low in calories and offer vitamin C, manganese, and antioxidants.

9.Watermelon:

 Mostly composed of water, watermelon is hydrating and contains vitamins A and C.

10.Oranges: 

Known for their vitamin C content, oranges are low in calories and provide hydration and dietary fiber.

11.Blueberries: 

Rich in antioxidants and vitamin C, blueberries are low in calories and offer various health benefits.

12.Raspberries:

 Low in calories and high in fiber, raspberries are a good source of vitamin C and antioxidants.

13.Blackberries:

 Similar to raspberries, blackberries are low in calories and offer fiber, vitamins C and K, and antioxidants.

14.Grapefruit:

 This citrus fruit is hydrating, low in calories, and provides vitamin C and dietary fiber.

15.Apples: 

Apples are low in calories, high in fiber, and offer vitamin C and antioxidants.

16.Kiwi: 

With a low calorie count, kiwi provides vitamin C, vitamin K, and dietary fiber.

17.Papaya: 

Low in calories and rich in vitamin C, papaya also offers digestive enzymes and dietary fiber.

18.Apricots: 

These small fruits are low in calories and contain vitamin A, vitamin C, and dietary fiber.

19.Cantaloupe: 

Low in calories and high in water content, cantaloupe is a good source of vitamins A and C.

20.Tomatoes: 

Low in calories and packed with lycopene (a potent antioxidant), tomatoes offer vitamins A and C.

Remember,while these foods are low in calories and nutrient-dense, it's essential to maintain a balanced diet and consume a variety of foods to ensure you're meeting all your nutritional needs.