In fact, they contain all 56 minerals. As a group of foods, sea vegetables contain the highest amounts of magnesium, iron, iodine and sodium. For those individuals who have a history of congestive heart failure or high blood pressure, it is recommended that sea vegetables be consumed only one time per week. Seaweeds contain extremely high amounts of calcium and phosphorous, and would be beneficial in situations where calcium is needed in the body. They are low in calories.
Seaweeds are rich in many trace elements as well.
Selenium, combined with vitamins A, C and E and beta carotene, is extremely important in the overall functioning of the heart. In summary, many clinical studies indicate that seaweed is one of nature's best nutritional supplements in healing. It contains virtually all of the minerals and vitamins that are useful in preventing free radical formation. Sea vegetables have been utilized in treating cancer, lowering blood cholesterol, thinning the blood, and even preventing ulcers. Sea vegetables are known for their effect on dissolving fat deposits and eliminating heavy metal contaminants from the body, including radiation, cadmium, and other environmental toxins.