One thing I've noticed is that about a year ago, when my face was much, much less androgenic (had more female hormones running through my body, somehow and gladly), my nails were more brittle and broke easily. Now, however, that my body is going through second male puberty (with extreme effects that are devastating me), the only positive is that my nails are now hard as a rock. Sadly, I'll have to wear fake ones anyway because mine don't ever grow into a particularly pleasing shape, they sort of flare out as they get longer.