"They are also rich in three important B vitamins: riboflavin, niacin, and pantothenic acid.Whole grains are also important sources of vitamins and minerals, such as thiamin, riboflavin, niacin, folate, selenium, zinc and iron.Mushrooms also contain B-complex vitamins, such as riboflavin, niacin, folate and pantothenic acid, not easily found in produce." . . . .