Shiitake mushrooms are rich in B vitamins—they are an excellent of pantothenic acid, a very good source of vitamin B2, and a good source of vitamin B6, niacin, choline, and folate. Additionally, they are concentrated in minerals, being an excellent source of selenium and copper, a very good source of zinc, and a good source of manganese. They are also a good source of vitamin D (in the D2 form) and dietary fiber. They also provide a wide variety of unique phytonutrients. To maximize their flavor and the retention of their nutrients it is important not to overcook them. That's why we recommend Healthy Sauteeing shiitake mushrooms for just 7 minutes to bring out their best flavor while maximizing their nutrient retention.