From Wikipedia, the free encyclopedia. Magnesium oxide (Mg O), or magnesia, is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium (see also oxide). It has an empirical formula of Mg O and consists of a lattice of Mg 2+ ions and O 2â ions held together by ionic bonding.
Today, the main ingredients of Marmite manufactured in the UK are glutamic acid-rich yeast extract, with lesser quantities of sodium chloride, vegetable extract, niacin, thiamine, spice extracts, riboflavin, folic acid and celery extracts, although the precise composition is a trade secret.maÊmit]), a French term for a large, covered earthenware or metal cooking pot. British Marmite was originally supplied in earthenware pots, but since the 1920s has been sold in glass jars shaped like the French cooking pot.
The reason Marmite is such a great source of umami is that it contains glutamic acid, an amino acid that also provides the rich umami flavor in foods like Parmesan, soy sauce and mushrooms. Because Marmite is vegetarian (and vegan), it's a great enriching ingredient for meatless cooks.armite is so quintessentially British that it was included in troop rations during WWI as a source of vitamin B, yet it's technically a German invention. Marmite is a brand of yeast extract, a product first created by German chemist Baron Justus von Liebig in the late 19th century.