@jodeej that's interesting that his nails seem stronger. I would think the two go hand-in-hand. My nails have always been weak though, not just after my transplant.
It seems that biotin has been recommended to many of us so more than likely they will say yes. I do always ask though. Sometimes I think the NP gets annoyed that I ask things like that, but too bad. From what I have read in her background info she is quite bright but to me she is the weak link in my transplant care, and everything goes through her.
JK