Prolana Nail Optimizer One-Step Multi Use Nail Fortifier, Nail Hardener, Nail Strengthener - Optimum Strength Nail Treatment (Refill Size) 4 oz/ 120 ml

This new version of Nail Optimizer is much better than the previous version and I thought that was very good! This is used as a base coat, in addition to a top coat, and it cleared up my soft and peeling nails instantly!!

Great product and great price. Has really strengthened my nails. I paid $13 for 0.5 oz at a nail salon. Now I can just refill the bottle with this one.

My nails were damaged after using gel polish for a long time. They were thin and peeling. About 4 months ago I purchased my first Prolana Nail Optimizer. I kept them short for the first month and then have let them grow since. I am extremely pleased with the results. I finally have nails again. I don't have the peeling any longer

Great product!

Great price....this is all my manicurist uses, both as base and top coats.

Excellent product that really works.

Don't see that it's helped. Feels strange. The top is too large.

I've purchased individual bottles in the past....never knew there was a larger bottle to refill what I have. Glad to have the larger refill size.