Hi birwin91
Well done to getting to a year. Hair and nails are both made from protein, so if your hair has improved, it stands to reason that your nails will. Interestingly, my toenails sound like yours, yellow and hard, and I have often wondered if it might be due in part to the booze. I am only at day 4, but seeing if my toenails improve is something I am looking forward to monitoring from quitting booze.