Scientifique K+ Keratin Hardener Strengthener | Protect Nails | Avoid Breaking and Splitting | Supports Natural Keratinization | Multi-color, 0.16 Fl Oz

This works better than anything else! This is not a polish. You need to Apply to clean, dry nails so the nails absorb the keratin. It takes 1 minute to dry. I have been using 3x a week and my nails have never been so healthy. I used to wear opi powder and gel nails, so my nails were wrecked when I began using this product. I do a lot with my hands, clean, create, scrub, garden. My nails have become so strong. I have tried everything and this is the best, worth every penny. Follow directions only apply to end of nail, moisturize cuticle with cream or oil for best results!! This is not sponsored.

This really works!! I have soft nails and was very surprised when my nails started growing out so strong. Will always have it on hand.

I have actually known about this product for about 30 years. I was introduced to it by a friend that worked in a salvage yard and had damage his thumb nail an this product helped repair it in just months.. if you have thin nails or use a lot of false, acrylic, or gel nails and your bed is damaged, you only need to use this product a few times to have strong healthy nails.. my only word of caution is this is like pure keratin so if you use to much your nail will become like glass and break easily. use it maybe once every two weeks till your nails are strong then stop for a few months.

My nails are soft due to gel and powder use, but this helps. I can now grow them out about ⅛-½" and they look great. At first, I used the strengthener about every other day. They grew long and started breaking off - so I backed off to about once each week. That sure does it for me! Then I put on a couple of coats of Londontown "Illuminating Nail Concealer," and I'm good to go!

Indiscutiblemente si algo puedo recomendar es este fortalecedor, endurece las uñas desde el primer uso, si lo usa continuamente ves un cambio radical en tus uñas crecen sanas y fuertes de una manera rapida, nunca habia probado algo similar, esto es único vale cada centavo en lo absoluto.

My nails are thin and soft but NEVER peeled until I started using this product. Instead of bonding the layers of the nail plate, it seems to separate them.

Didn’t do anything for my nails. Didn’t see a difference

This stuff is amazing! I have a nail that splits. It was broken below the quick when I ordered this 3 weeks ago. My nail is now grown out past my finger + no split AND all of my nails are strong, no bending or tearing!