Twinbergs Non-Fortified Nutritional Yeast Flakes 125g, Vegan Nooch, High in Protein with All 9 Essential Amino Acids, Source of B-Vitamins, Ideal for Silken Tofu Sauces, Cheesy Pasta, Baked Potatoes. VITAMIN RICH: These unfortified nutritional yeast flakes are a source of folate and other essential B vitamins, as well as iron.