One medium apple contains 80 calories, five grams of fiber, and zero fat, cholesterol, or sodium. Fiber is beneficial to the body because it helps lower cholesterol. Apples also contain flavonoids, substances that prevent heart disease and some types of cancer. When you cannot brush your teeth, eat an apple. It will cleanse your mouth of more than 95 percent of the bacteria that causes tooth decay.
Fish remains one of the healthiest, low-calorie food choices.
It is also an excellent source for nutrients such as protein, omega-3 fatty acids, vitamin B, fluoride, iodine, zinc, and iron. Even canned salmon and sardines are excellent sources of calcium. However, you may consider decreasing your consumption of larger fish such as salmon, mackerel, tuna, and swordfish. Recent studies have shown that larger, fatty fish are most likely to contain dangerous chemicals such as pesticides and mercury. These harmful chemicals permeate the waters, although actions are being taken to outlaw their toxic dumping.