the doctor doesn't think the drug will help them, but he does think it's worth doing a study to find out. the drug can have serious side effects. kyle hasn't had any, and he's enjoying his new head of hair. >> i've always wanted an '80s hockey mullet. so maybe going towards that. >> oh, my gosh. i love him. >> i had to look up what an '80s hockey mullet was. >> i can only imagine. >> i wanted to talk a little bit about why would an arthritis drug do this. >> connect the dots. >> rheumatoid arthritis is an auto immune disease. the kind of alopecia he has is an autoimmune disease. they have a similar basis. >> so if you don't have this kind of autoimmunity, therefore you won't have the hockey mullet that he got. >> right. the doctors don't think that you will. the doctors i talked to. now, one of them said, look, we should study it. who knows. you never know what you're going to find out. another doctor said, eh, no way. this would never work for regular old male pattern baldness. this could be great news for people with his form of alopecia. >> love that. love his sense of humor. >> he is adorable.