Raw mushrooms preserve nutrients that heat breaks down, particularly vitamin C, thiamin, and some B vitamins.
Six large raw white mushrooms contain about 24 calories and 1.1 grams of fiber, and they hold onto roughly twice the riboflavin, vitamin B6, and folate of the same mushrooms once cooked.
The appeal of raw mushrooms comes down to three things: nutrient retention, texture, and convenience. Sliced raw mushrooms add crunch to a salad without any prep time beyond washing and slicing.