Savoury Nutritional Flakes, or Nutritional Yeast as they are sometimes referred to, are packed with nutrition. They are high in B Vitamins and other trace minerals, a source of Zinc, and one of the only vegan sources of Vitamin B12, a complete bioavailable source of protein and a natural source of fibre. How are Savoury Nutritional Flakes made? Savoury Nutritional Flakes are made from a single-celled organism fungi called Saccharomyces Cerevisiae grown on GMO-free molasses. They are harvested, washed and dried with heat to 'deactivate' them and then rolled to form flakes. Savoury Nutritional Flakes or 'yeast flakes' should not be confused with traditional baking yeast as they contain no alcohol and won't cause or exacerbate candida or leaven baked goods.