Berries have been valuable as a food source for humans since before the start of agriculture, and remain among the primary food sources of other mammals. They are small, pulpy, and often edible fruits. Besides, they are typically juicy, rounded, brightly colored, sweet or sour, and do not have a stone or pit. In addition, berries are a key part of any healthy diet, because they are packed with antioxidants, called anthocyanins that may help keep memory sharp as you age. Furthermore, they are great sources of fiber, which is important for a healthy digestive system.