7 foods that are basically calorie-free

Non-starchy vegetables: Leafy greens like spinach, kale, and romaine lettuce pack a nutritional punch with vitamins, minerals, and fiber, all for around 5-15 calories per cup. Bell peppers, celery, cucumbers, and zucchini are also great choices.

Mushrooms: These versatile fungi are low in calories (around 20 per cup) and fat-free, while offering potassium, B vitamins, and antioxidants. Enjoy them sauteed, grilled, or in soups and stews.

Citrus fruits: Grapefruits, oranges, and tangerines are loaded with vitamin C and fiber, and clock in at around 50-70 calories per fruit. They're also hydrating and refreshing.

Watermelon: This summer favorite is mostly water (hence the name!), with only about 40 calories per cup. It's also a good source of vitamins A and C, making it a healthy and satisfying snack.

Cantaloupe and honeydew melon: Similar to watermelon, these melons are low in calories (around 50-60 per cup) and rich in vitamins and antioxidants. They're a sweet and hydrating treat.

Tomatoes: Don't underestimate the humble tomato! They're low in calories (around 18 per medium tomato) and a good source of vitamin C, potassium, and lycopene, an antioxidant with potential health benefits.

Clear broth: Bone broth and vegetable broth are low in calories (around 35-50 per cup) and provide hydration and a boost of electrolytes. They can be enjoyed on their own or used as a base for soups and stews.