Mushrooms are certainly one of the most delicious types of fungi, but they're also among the most medicinal. About 100 species of mushrooms are being studied for their health-promoting benefits, and about a half dozen really stand out for their ability to deliver a tremendous boost to your immune system.
You really can't go wrong with any of the edible mushrooms, as they are rich in protein, fiber, vitamin C, B vitamins, calcium, and minerals, along with being excellent sources of antioxidants.
Mushrooms contain polyphenols and selenium, which are common in the plant world, as well as antioxidants that are unique to mushrooms (like ergothioneine, which scientists are now beginning to recognize as a "master antioxidant").
That being said, if you're looking for the ultimate mushroom in terms of nutrition and flavor, the shitake mushroom may be king. Famous for their rich smoky flavor, shiitake mushrooms are said to have more than 10 times the flavor as white button mushrooms and they're known as a symbol of longevity in Asia because of their many health-promoting properties.1