Speaking of foods that burn fat, grapefruit is a needless mention. It is an organic item that is rich with fiber. Studies show that the natural properties of a grapefruit steps up the metabolism rate and scorches quite a good amount of calories eventually. This fibrous fruit works wonders in stabilizing glucose levels in the blood stream. Be it in a fruit salad or in the form of a smoothie, grapefruit is a must eat when trying to cut-down pounds.