Seaweed

"Seaweed is an excellent source of iodine, which is necessary for a healthy thyroid, which is important in hair health," says St. Surin-Lord. "Seaweed also causes proliferation of the dermal papilla cells and helps to reduce 5-alpha reductase, which is an enzyme in the hair follicle that causes hairs to miniaturize, leading to hair loss." The next time you`re packing a work lunch, throw in a pack of seaweed chips.