Seaweed has been used for healing by humans since ancient times Scientists report that Seaweeds are rich in vitamins A1, B1, B2, B6, B12, C, E, K, pantothenic acid, folic acid, and niacin. They are an important supply of 60 trace elements and an excellent source of over 12 minerals, especially sodium, potassium, calcium, magnesium, phosphorus, iron, zinc and manganese. In fact, Seaweeds contain much larger concentrations of what is present in seawater, and in a form, which can easily be assimilated. The potassium-sodium content of sea vegetables is usually quite close to that occurring naturally in the human body. Many marine algae are a source of vitamin B12, which is rarely found in land vegetables.