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.
By 1912, the discovery of vitamins was a boost for Marmite, as the spread is a rich source of the vitamin B complex; With the vitamin B1 deficiency beri-beri being common during World War I, the spread became more popular.British troops during World War I were issued with Marmite as part of their rations.armite is traditionally eaten as a savoury spread on bread, toast, savoury biscuits or crackers, and other similar baked products. Owing to its concentrated taste it is usually spread thinly with butter or margarine.