Nail strengthener

I heard that nail strengtheners are good for damaged nails, so I searched and searched before purchasing this OPI nail strengthener. The price was a bit steep, but I bought it because it was a recommended product. I applied it every five days, and I started seeing results after repeating the process about three times. One bottle lasts quite a while. Since I tend to apply nail polish frequently during the summer, I think it would be good to apply this often.