Eating colorful berries is good for us. The dark color in blackberries makes them stand out in fruit salads and desserts, but it also indicates a high concentration of antioxidants. Research suggests that their vitamin content may help reduce your risk of heart problems, periodontal disease and age-related decline in motor and cognitive function. Blackberries are low in calories, virtually fat-free, high in fiber and rich in nutrients, making them a good choice for anyone trying to maintain or lose weight in a nutritious manner.