Red algae (Lithothamnium spp.)

Red algae (Lithothamnium spp.) are species of algae that are rich in the essential minerals calcium and magnesium and contain a number of trace minerals including manganese, selenium and zinc 1. Lithothamnium species belong to the family of coralline algae, Corallinaceae. They are harvested off the coasts of Britain and France to be used as a source of calcium (calcium carbonate) and magnesium (magnesium carbonate) in dietary supplements.


  1. Frestedt JL, Walsh M, Kuskowski MA, Zenk JL. Nutr J 2008;7:9.