Kelp is a type of seaweed that grows in shallow, nutrient-rich saltwater. It is a good source of iodine, which is important for thyroid function and overall health. Kelp is a good source of several vitamins and minerals, including iodine, vitamin K, vitamin A, vitamin C, folate, calcium, iron, magnesium, phosphorus, potassium, zinc, copper, manganese, and selenium. These nutrients may have potential health benefits, such as supporting thyroid function, promoting bone and muscle health, and reducing inflammation. The antioxidants found in kelp may also have potential health benefits by helping to protect against oxidative damage.