Retainers guide and maintain the position and alignment of teeth to create an attractive smile, and today there's quite a range to choose from. Essix retainers, in particular, are clear, slim molds that fit over your teeth. Your orthodontist might recommend an Essix retainer as the final stage in a course of orthodontic treatment, or as a complete alternative to braces. Retainers are fixed or removable and made of wires or plastic.
Kelp is largely used in traditional medicine for various conditions. 1  Kelp is a good source of glutamic acid, an amino acid responsible for its taste. 2  Kelp or kombu contains extremely high levels of iodine. 3  Another health benefit from Kelp is that it is also a source of dietary fiber.
The kelps generally include the many large brown seaweeds and are among the most familiar forms found on North American coasts. Some have fronds up to 200 ft (61 m) long, e.g., the Pacific coast Nereocystis and Macrocystis, found also off the Cape of Good Hope.ommon Species and Their Uses. The largest of the green algae, Ulva (sea lettuce), grows to a ribbon or sheet 3 ft (91 cm) long. It provides food for many sea creatures, and its broad surface releases a large amount of oxygen.