Komba, nori, and arame seem to be top ones for hair growth. The Komba had 775% Iodine per serving, the nori 70%, and arame 100%+ of iodine per serving. I remember my hair having a three inch growth spurt in two months time a couple of years ago, and I remember that back then i ate the SAME thing for dinner each night: a bowl of miso soup, salmon, rice, and seaweed added to the miso. I even snacked on seaweed throughout the day. I'm taking this up again, to see what happens... Who's with me??!!