Neil,One of the things I noticed that helped with my nails breaking was how medication effected them. When I was finally able to stop taking my prescription med, which various sorts I'd been on for years, my nails quit breaking and grew faster than they had in years. I'd always thought it was just the computer keyboard that was being hard on them. Ironies of ironies, I have nice strong nails now and have to keep them trimmed short, again, just like in school, because I am finally playing my violin, again, once in awhile!
kat