The King Oyster mushroom (pleurotus eryngii) has a long history of use in traditional medicine due to its perceived health benefits. It contains the powerful antioxidant ergothioneine, unique to fungi, which acts to protect cells from damage and boosts the immune system.
According to a recent study published in “Food Chemistry,” oyster mushrooms like the King Oyster contain significant levels of zinc, iron, potassium, calcium, phosphorus, vitamin C, folic acid, niacin, and vitamins B-1 and B-2.
According to a separate Penn State study, mushrooms like the King Oyster contain more antioxidants than tomatoes, zucchini, carrots or green beans. Antioxidants protect cells from the damage that can be caused by free radicals, the loose oxygen molecules created as the body turns food into energy.
King Oyster mushrooms have been studied for use as a testosterone booster. The mushroom has also drawn the attention of researchers investigating bioactive mushrooms that suppress fatty acid absorption.