Marmite is a dark brown savory spread made from the yeast that is a by-product of the brewing industry. It's great on toast. Teething babies love it on toast strips which are known as "soldiers". Marmite can add a wonderful and rich flavor to casseroles, soups and almost any savory food. Marmite is rich in B Vitamins, riboflavin and Niacin and is 100% vegetarian.