Mushrooms are low-calorie, nutrient-rich fungi packed with essential vitamins and minerals. They are a great source of B vitamins (B2, B3, B5), selenium, potassium, and antioxidants. Mushrooms also contain ergothioneine, a powerful antioxidant that supports immune function and reduces inflammation. Some varieties, like shiitake and reishi, offer additional health benefits, such as boosting immunity and heart health. Plus, they are a great plant-based source of protein and fiber, making them a valuable addition to any diet.