Brazil Nuts contain very high levels of selenium. Selenium plays a major role in the proper functioning of your thyroid gland. By ensuring proper functioning of your thyroid gland (and the production of thyroid itself) the high concentration of selenium will ensure that your bodily processes are maintained and your metabolism remains strong.
Hijiki is loaded with iodine. Iodine plays a major role in the manipulation and balance of our hormones, as it directly interacts with the thyroid gland, one of the most important aspects of the entire endocrine system.