White miso is made from boiled soybeans, and red miso is made from steamed soybeans. Fermented foods are foods that have been through a process of lacto-fermentation in which natural bacteria feed on the sugar and starch in the food creating lactic acid. This process preserves the food, and creates beneficial enzymes, B-vitamins, Omega-3 fatty acids and various probiotics, improving our digestion. Equally, natural fermentation of foods has been shown to preserve nutrients in food and break it down to a more digestible form.