Because of its "magical" healing properties, seaweed used to be considered a luxury product. Today, it's an important part of Ayurvedic medicine (a Hindu healing system from India), thalassotherapy (saltwater therapy), phytotherapy (herbal medicine), and macrobiotic cuisine.
Algae have been used as medication in China and Japan for hundreds of years, and seaweed was (and is) a substantial part of the daily diet and traditional herbal medicine in these countries.
Seaweed is regarded in those regions as a treatment for tuberculosis, rheumatism, colds, open wounds, and intestinal worms. In recent years, seaweed has been promoted in various health movements and by "health gurus." It's seen as a superfood with many benefits to your health!
It is presumed to help fight or prevent common ailments including thyroid issues, buildup of oxidized cholesterol, gastritis, arthritis, menopausal symptoms, skin problems, and esophagitis.
Furthermore, seaweed — especially brown algae — contains antioxidants, which protect against cardiovascular diseases and some forms of cancer. Because of the potential benefits of antioxidants, research into the positive effects of seaweed has gotten a boost.
It is, however, important to realize that these health claims have not been sufficiently examined and are often unproven.