I’m still using my old bottle of NailtiquesProtein Formula, it used to be under a different name (Nailtiques) but the factory burnt down. This is the only thing I have ever been able to use and honestly I had talons. It has protein in it and you need to do it every day but after about 6 weeks mine were so strong. I haven't used the new brand as I still have a bottle of the old stuff.