Kelp is a type of large brown seaweed that grows in shallow, nutrient-rich saltwater. It contains a variety of vitamins, minerals, trace elements and enzymes, including Iron, manganese, calcium, magnesium, copper, zinc, riboflavin, niacin, thiamine, vitamins A, B-12, B-6, and C. It is also a good source of iodine, which is important for optimal thyroid function and metabolism.