Negative calorie foods speeds up your metabolism and therefore can help with your weight loss efforts. You can eat bigger portions and more often and yet burn more calories, because your body will use more energy for digestion. So for example, you will eat a fruit that has 40 calories but your body needs 100 calories to digest the fruit, which means that your body will burn 60 calories. One of my favorite vegetable is celery and I am using it quite often. Piece of celery that contains 5 calor... Healthy Recipes, Health, Paleo, Snacks, Nutrition, Healthy Life, Healthy Eating, Detox, Smoothies