5.0 out of 5 stars A Miracle

A.C. · May 11, 2025

(function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } I have waited four months to write this review because it just seemed too good to be true. But it is true. I am a senior citizen who suddenly found all my nails chipping, cracking, and splitting. I thought about posting a "before" picture, but they looked too awful. I used to try to hide my hands when in public. I tried nine months of biotin capsules, and no results. I found a recommendation from other users online of the ISDN product. When I started using it, I was completely skeptical. The product is clear, thin, and more like water than anything else. I could not see how this could work. It took six to eight weeks before I began to see genuine results - tiny 1/8" nails taking the place of nails that looked like they had been chewed off by rats. Now, five months on, I have 1/4" normal-looking nails that make me happy every day. I have to file them to keep from getting too long, but not in order to even out breakage. They don't seem to chip or break at all under normal use. I actually took the ISDIN box to show my doctor. She said they often have people ask for help with breaking nails, and they never have anything to suggest. She took down the info about this product.For me, a container lasts about two months or longer. I have noticed that the applicator doesn't always work the way the instructions say. Often I get enough product from one "click" to do a whole hand. Other times, the applicator needs to be primed several times. But I don't care as long as it works SO well.Reading over my review, it looks like someone paid me to write it! It's all true.

5.0 out of 5 stars Really truly works

G. · April 11, 2025

Life changing (at least for my nails LOL). I never leave reviews but this is too good not to share. Disclaimer: I'm a nail nut. A few years ago, at the age of 53, I decided I was very tired of brittle, flaky, dry, weak nails. I have always taken care of my nails, so the changes I was seeing were age related. I was eating healthy and exercising, was using nail polish but never gel, I moisturized etc. Nothing was helping. I used a special nail oil 6-8 times a day and no acetone and no nail polish for A YEAR and saw very little improvement. Then I discovered Dr Dana's Deep Hydrading Formula and saw an immediate improvement using their Deep Hydrating Formula...again I applied it on average 6 times a day so definitely was committed. My nails stayed short but stopped splitting and chipping...that was after about a month of use. They also have a hyaluronic serum but recommend using once a week. Then I discovered this product and went nuts with it. I bought three applicators, kept one by my desk, one in my bathroom and one in my car. I probably apply it 12 times a day LOL...certainly after any time I was my hands. It's easy. I apply a top 'coat' of the Dr Dana Formula after using the SI-NAILS. This is the magical combo. My nails are strong, flexible, and growing. This is the best they've looked in 20 years. So if you are unhinged like me and willing to go the distance, the combo of these two products changed my nails, they look 30 years younger ;)

1.0 out of 5 stars be aware of limitations

d.g. · June 5, 2025

On line limited info. Reading the package directions at home made me realize this is not a good product and I won't use it. After applying it to your fingernails, you have to reapply again after you wash your hands. I'm not going to have dirty hands. My hands are washed frequently during the day. Perhaps, if someone sits and does nothing during the day, they might benefit from this product.

5.0 out of 5 stars Actually works!!!!!

L. · May 25, 2025

I have tried dozens of products like this for my nails over the years. This is the first that works -- and it works amazingly well, even on my weak, brittle nails. It began strengthening my nails in ways that were obvious within the first couple of days. My nails were longer and stronger well before the first week was up. Although it strikes me as expensive, I plan to keep using it, because it actually works!

4.0 out of 5 stars Really works!

A. · March 29, 2025

I’ve been using this off and on for about 2 months and have noticed a difference on my brittle, peeling nails. I’ve tried dozens of different products and nothing else has helped. I’ve put this on my bare nails 3-4 times a week at night (when I wasn’t wearing nail polish) and it has drastically reduced the peeling and cracking that has taken over my nails as I’ve gotten older. It is pretty expensive but I’m on the same tube 2 months later so it’s definitely worth a try!

5.0 out of 5 stars Excelente fortalecedor

E.M. · June 13, 2025

Lo mejor que he encontrado hasta el momento para fortalecer las uñas

3.0 out of 5 stars did strengthen slightly, but ridges not affected

C.J.W. · March 1, 2025

I used this product daily for 8 weeks. I do believe it has slightly strengthened my nails as I haven't had any split in the past month. However, I was mostly hoping it would make the ridges in my nails less evident, and that has not changed. I will use up what I have (I found one tube lasts me a month), but due to expense will probably not buy any more.

Si es efectivo

m.j.b. · April 29, 2025

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Muy efectiva

T.p.g. · November 5, 2024

Me está dando buen resultado

Muy recomendado

A. · October 26, 2024

Siento que me dura relativamente poco, pero parte de eso es la gran cantidad de veces que lo utilizo, tengo unas uñas en extremo delgadas y quebradizas y esto ha sido lo único que me ayuda realmente.

Llegó a tiempo.

A. · March 29, 2024

Llegó a tiempo y bien empaquetada. Es de uso muy práctico. Apenas la estoy usando pero en la uña comienza a notarse un cambio.Sin embargo falta tiempo de uso para especificar si en verdad funciona o no.

Uñas

j.h.v.s. · May 2, 2024

Para uñas quebradizas