Kelp is a type of seaweed that can be eaten raw, but it is usually dried, granulated, or ground into powder. It is also available in liquid form that can be added to drinking water. Granulated or powdered kelp can be used as a condiment and for flavoring, as a salt substitute . If you find the taste unappealing, you can purchase it in tablet or capsule form.  

Kelp is a rich source of vitamins, especially the B vitamins, as well as many valuable minerals and trace elements. It is reported to be very beneficial to brain tissue, the membranes surrounding the brain, the sensory nerves, and the spinal cord, as well as the nails and blood vessels. It has been used in the treatment of thyroid problems because of its iodine content, and it is useful for other conditions as varied as hair loss , obesity and ulcers. It protects against the effects of radiation and softens stools. Kelp recommended as a daily supplement, especially for people with mineral deficiencies.