After chapter 12 of the manga, or episode 5 of the anime, Izumi is left with a scar on the center of his chest and back. He becomes more muscular, and in the anime he removes his glasses, since he no longer needs them. After chapter 17 of the manga, or episode 7 of the anime, Shinichi begins spiking his fringe upwards.
Sulfur is also important for the protein quality of produces, and controls plant metabolism in enzymes. Plants take up sulfur in the form of sulfate. Because of the synergies between nitrogen and sulfur, it is most efficient to apply these two nutrients together.
1 Sulfur makes up vital amino acids used to create protein for cells and tissues and for hormones, enzymes, and antibodies. The body uses up its store daily so it must be continually replenished for optimal health and nutrition.  Sulfur is needed for insulin production.