Calcium From Pure SeaweedTogether Healths calcium comes from 100% seaweed, sustainably harvested from the pristine, sparkling waters off Atlantic coastlines like Ireland and Iceland.Seaweed absorbs trace minerals from surrounding seawater during its growth phase. These minerals then calcify to a skeletal structure and mature material settles separately from young and live material on the seabed. After that, it is harvested sustainably.Naturally Effective IngredientsTogether Health use seaweed as their source of calcium. That means it comes complete in a marine multi-mineral complex to provide you with bioactive calcium - along with 72 other trace minerals. This matters, because our bodies can recognise and absorb minerals far more easily when theyre taken from natural and complete sources.