A uniquely porous, honeycombed cell structure gives Aquamin calcium many significant advantages over regular grades of calcium. Other than washing and milling, Aquamin is unaltered from raw material found in the North Atlantic seabed around the Icelandic coast. A natural multi-mineral material that is suitable for many food and supplement applications, Aquamin calcium can be considered 100 percent plant-based, clean label, and sustainably sourced.