Kelp has been used for around 2000 years as an important source of nutrition grown in nutrient rich seawater it provides a fabulous array of minerals in a highly digestible form including calcium iodine and magnesium metabolism sea vegetables arguably the finest sources of organic minerals on the planet are extremely rich in iodine the mineral needed for regulating the thyroid gland and ensuring a healthy metabolism iodine39s positive impact on the thyroid appears to help lower