I On Nails: Ultimate Nail Strengthener, Growth & Repair, Clear Polish Hardener, Keratin Treatment for Damaged Nails - Hard as Nails Elixir.

Works great. My nails are strong and long now. This is the best product I have. I tried so many and they are a waste of time and money. I tell everyone about this product. It is worth a try.

Day 1: Directions are twice a week (NOT SEVERAL TIMES A DAY) DAY 2: Applied nicely, dried quickly. 2 coats. (Did NOT burn or cause some bizarre chemical reaction as someone suggested. And I am autoimmune) Day 3: First day after application: wore my kitchen gloves to clean kitchen blinds. Polish didn't peel, chip or change, even though gloves were soaked with sweat inside. (Sally Hansen hardener would have peeled off and chipped.) Day4: Put one more coat, as instructed. (Q: do I remove polish before applying the second time? I didn't.) Day5-7: Normal housework. No chips or peeling. Great stuff!!!!!

Works very well on weak brittle nails.

I have great results with growing out my nails when I use this regularly.

Buy it .. I buy a lot of nail strengtheners and this one stays; doesn’t peel off doesn’t burn actually does what it says ! Use twice a week.. I leave on for a little over a week then take it off and start over ! Definitely worth it and I’ll be buying again !

I love this nail hardner.

I think this product changes color with age, suppose to be clear turns blue with age

The only thing that helped my brittle, short nails.