The finest donko grade. Small, young, tightly curled shiitake are treasured for their thick caps and spectacular flavor. Grown on oak logs in a natural forest habitat, hand harvested and sun-dried. A revered health food. Research indicates shiitake's unique polysaccharides may help to stimulate immune system strength. Rich in vitamin D and fiber, and a good source of niacin B3. Mushrooms are the only vegetable source of vitamin D and only the dried are a rich source.