Although they are best known for their anti-aging properties, blueberries can also aid in weight loss. They contain only eighty calories per cup, which makes them the perfect low-calorie snack. Blueberries are high in antioxidants and vitamin C that bind to free-radical toxins and move them out of the body, which is an important step in the weight loss process. One cup of blueberries provides approximately four grams of fiber to help keep individuals full until their next healthy meal. Individuals can start their day off with a bowl of oatmeal and top it with blueberries, or add blueberries to a healthy smoothie. Blueberries are also great to snack on throughout the day.