ISDIN Si-Nails - Fast Absorbing Nail Strengthening and Hardening Serum for Nail Durability in Thin Nails, made with Cationic Hyaluronic Acid 0.08 FL OZ

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 ;)

It works! I've tried so many products that were "supposed" to strengthen my nails so I was skeptical. I went to a new nail salon and they drilled my already thin nails into nothing. My nail beds were tender for 2 weeks. I was looking for ANYTHING that might help. I read the reviews and decided to give it a try. After the first week, I noticed my nails were definitely stronger. I've been using for 2 weeks now and I've been amazed. This stuff is the real deal!

Couldn't test if the claims that this product improved nails in as little as a month, as it ran dry in less than half that time.It was only turned tip down when in use. It was certainly never stored in that position. At first, it was stored laying on it's side on my bedside tray between uses. It did not leak while the cap was closed, but I quickly became concerned that product was being wasted when so much poured out the moment I removed the cap. I switched to storing it tip facing up in a small pencil box. After the change, no product poured out just by removing the cap. The instructions tell you to pump once for EACH nail. I never had to pump more once for ALL of them, and often there was still more than my nails could even absorb. For the first week. After that, there was considerably less. It has now been less than 2 weeks it and it is completely dry. It might be a good product in poor packaging?? Couldn't use it long enough to find out. It is of course possible I just got a dud. But I'm not willing to shell out another $29 to find out.Very disappointing.

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!

I have tried every product and supplements to get my nails to grow. I got tired of paying $60 every two weeks for my nails. This product is a game changer. My nails were very damaged when I took them off and started using this product. my nails are short but enough that I feel comfortable putting on some nail polish and this works over nail polish. Perfect .it was worth the money.

It works. Before & after 4x months (pics). I use it every other night now. Just one swipe on each nail before bed. I’m on my second tube, it doesn’t last long initially but you can taper off how often you use it making it more cost effective. Still- I’ve never had nails this beautiful in my life. Worth every dollar.

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.

This goes on easy I apply it a few times a week to strengthen my nails… it has only been a few weeks but I like this.I would buy again.