Broccoli

• Broccoli is a great low-calorie diet food. One-half cup of broccoli only has 27 calories. It is high in dietary fiber (10 percent daily amount) and is high in both Vitamin A (24 percent) and Vitamin C (84 percent).
  
  

Brussels Sprouts

• Brussels sprouts are also a healthy low-calorie diet food that can be filling. One-half cup serving has 81 percent of your daily amount of vitamin C, while only having 28 calories.
  
  

Celery

• Celery is well known as a low-calorie diet food. One full cup of chopped celery only has 16 calories, yet still manages to give you almost 10 percent of your daily amount of vitamin A.
  
  

Mushrooms

• One full cup of raw portabella mushrooms only has 22 calories. While low in calories, mushrooms still give you over 15 percent of your daily values for riboflavin, niacin and copper.
  
  

Ground Turkey

• As far as meat is concerned, turkey is a very low-calorie diet food. One 4-oz. patty (as defined by the USDA) has less than 200 calories.