Nutritional Benefits of Strawberries One handful of strawberries has just 30 calories and two grams of gut-healthy fiber. They’re a good source of potassium, manganese, and vitamin C, which is great for the immune system and tissue repair in the body. Strawberries are rich in anthocyanins, which are colorful pigments with beneficial effects such as heart health and reducing inflammation in the body. Strawberries are also helpful to those with diabetes. They can slow the absorption of glucose when eaten with a high fiber meal. Strawberries also contain polyphenols, antioxidant plant compounds