Both bananas and mangoes are known for their ability to provide quick carbohydrates, making them favored snacks for energy before and after exercise. Data from the USDA indicates that a single banana offers approximately 375 milligrams of potassium, whereas one cup of mango contains 277 milligrams. This potassium is vital for muscle performance and hydration. In contrast, mangoes are richer in vitamin C, supplying about 60 milligrams, compared to just 14 milligrams found in bananas. Nutrition specialists advocate for combining either of these fruits with protein to achieve more stable blood sugar levels and sustained energy throughout the day.