I'm 21, also male. I initially started taking Iodine as a last ditch effort to clear up a persistent Acne problem but one of th pleasant surprises for me anyway was that my hair quit falling out. mind you, the hair that did fall out hasn't grown back but at least I'm not losing anymore. So good luck. Also I took 50mg a day back then when i was first starting. You may get similar results with 13mg, i suppose it just depends on how deficient you are. good luck.