Oyster mushrooms are an excellent source of several vitamins, including niacin (providing 21% of your recommended daily intake), riboflavin (18%), and pantothenic acid (11%). You'll also get smaller amounts of folate, vitamin B6, and thiamin.

Minerals in oyster mushrooms include phosphorus, potassium, copper (each providing 10% of your daily needs), iron, magnesium, zinc, manganese, and selenium.

Oyster mushrooms contain a number of substances thought to influence health. These substances include dietary fiber, beta-glucan, and several other polysaccharides—a class of carbohydrates found to affect immune function.

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