The thing that cured my nails of splitting like that was a product called ProStrong I get at QVC. I just use the strengthener, not any of the other products. It lasts a long time. I am "elderly" so have that nail problem, and hypothyroid, on drugs for years, but all the creams I tried didn't help, just the ProStrong. I keep a supply on hand. It paints on like water - use twice a day.