Umami "pleasant savory taste" Not only is this a great hair strengthening but it tastes great. Seaweed is an incredibly concentrated source of nutrition, especially minerals like iron, manganese, iodine, copper, zinc and selenium. Both zinc and iron are essentials for healthy, strong hair. And the iodine in seaweed is processed by the thyroid gland to become thyroid hormone, which stimulates energy production and growth of hair & nails. The Yaki Nori brand is the yummiest I have had so far.