ISDIN Si-Nails Strengthening & Hardening Nail Serum Treatment, 0.08 fl oz

This stuff was literally an answer to prayer! HIGHLY RECOMMEND! I had been struggling with thin, peeling nails for over a year. I had back-to-back surgeries and my dermatologist told me my damaged nails were probably a result of the anesthesia. (I've never done regular manicures and very rarely polish or gel, so I couldn't blame that.) My nails were so thin they hurt and they would continually split and peel no matter how much I used nail strengthening treatments or polishes. I was at my wits end and tried ordering ISDIN as a last resort. I thought it was a little expensive at the time, but now I believe it was worth every penny! I keep an extra tube on hand now so I never run out.The product and brush are so easy to use. In the beginning I applied it twice a day but tried to keep using it at least once a day for two months. Now that my nails have improved I use it about every 1-2 days. The product is easy to apply and dries and disappears very quickly. I was worried it would be messy and sticky but it is not at all. Sometimes it takes one click per nail to get it going, but sometimes one click will treat a few fingers. A little goes a long way and you will get the feel of it.The product does take time to work. It was 2 months before I had a complete nail grow out without peeling. They are strong now but I am still careful to not use my nails as "tools" so that I don't break them. I still have a split on my thumbnail but I believe it will grow out as long as I am careful and keep applying the product every few days. I will say my nails are a little "ridged" and I don't know if that's just my nails or a result of the product, but it is a small price to pay for strong nails and I can just buff them down smooth.The photos you see are: 1. at the beginning of use, 2. after 6 weeks of using the product, and 3. at 2 1/2 months (they do grow longer but I like to keep them short)Don't hesitate! Buy this product!

Isden for nails is a wonderful product, recommended by my dermatologist. I was skeptical at first due to the condition of my split, layering nails. Within two weeks of using this product was amazed how it had transformed the condition of my nails. I purchased in early July, using it once a day, and still have product in the pen late September. My nails have never been in this good of condition. I highly recommend Isden for nails. It does what it says it will do. You will not be disappointed.

A good, high-quality product; I received great help, and I loved it.

Very disappointing in terms of the amount of product in the pen. Actually a bit of a rip off given the price of the product. I have used a similar product with supposedly the same amount of product in the pen and it has lasted me more the twice the mount of time. Another issue ... you cannot see what is in the pen. So, imagine my surprise when I could no longer "click" the pen and pressing the top did not do anything at all. Pen was dried up. Does not matter if it works as it won't last long enough to make that determination. I frequently spend large amounts of money for top of the line cosmetics ... if they deliver what they promise ... I am fortunate enough to be able to buy more. This is not a product I will repurchase nor will I recommend it to anyone. I don't mind spending money ... but I really dislike being cheated.

I’m very particular about what I use on my nails, especially when something is marketed as a “treatment” or “serum.”This works—but not in the way the name suggests.If you look at the ingredient list, this is not really a nail health or repair serum in the true sense. You’re not getting ingredients that meaningfully support nail growth or structural repair at a deeper level.What you are getting is a formula built more for surface improvement.There’s a high amount of alcohol, which helps it dry quickly and gives that immediate, lightweight feel. You also have film-forming ingredients like acrylates copolymer that create a smooth coating over the nail. That’s what gives the appearance of smoother, more uniform nails.There are some hydrating components like hyaluronic acid derivatives and glycols, but in this type of formula, they’re functioning more for temporary conditioning rather than long-term repair.The mastic gum is interesting—it’s sometimes used for tightening and refining effects—but again, this is more about surface appearance than actual nail health.So what does it do well?It smooths the look of the nail, gives a more polished appearance, and can make nails feel a bit more reinforced temporarily. It’s more like a cosmetic finisher than a treatment.Application is easy. The brush pen format is convenient and intuitive, and it absorbs quickly without leaving residue. It’s simple to work into a routine.But from a value standpoint, I don’t think it justifies the price.There are less expensive options that are better formulated for actual nail strengthening and repair—especially if you’re looking for long-term improvement rather than a temporary smoothing effect.That distinction matters.If you go in expecting stronger, healthier nails over time, this may disappoint. If you think of it as a quick, cosmetic smoother, it makes more sense.Overall, it’s fine. It does what it does—but for me, it doesn’t stand out enough to justify the cost.

I've only been using this product for approx a month and my nails aren't any better. A friend gave me this product and it ran out so I bought another one hoping it would work.

I wish I had thought to take "before" pics for this review. For years, my nails have been an embarrassment. The nails were brittle and would just rip apart if they grew past my nail bed. The top layer would peal back. If I was out with a group of people I would try to keep my fingers hidden. Sometimes, I notice women looking at them. Ugh, what an embarrassment. I finally went to a dermatologist who ran some tests. Results... my body is no longer storing "zinc", which promotes strong nails and hair growth. She immediately recommended this product. After using one pen, you can see in the pics that my nails look pretty healthy and are growing again. I'm so relieved that I just needed to write this review. If you are experiencing these types of issues with your nails, see your doctor, but also, give this product a try!

because it is such an expensive product and it did not work I thought about it a lot but I have been using it for 1 month. I do not use it daily at least 2 times a week but my nails grow and they are a little harder. I do not regret having bought it. good product and if

نتيجه بطيئه مو نفس اول واحد شريته

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.

Espectacular producto

Me gusta este producto, ayuda mucho al crecimiento de las uñas, en mi caso si ayuda a que crezcan pero se me siguen rompiendo :(

Lamentablemente me queme las uñas debido a una reacción alérgica al gelish 😢 lo adquirí para empezar a cuidar mis uñas naturales de nuevo y es una verdadera joya, están creciendo bastante, súper fuertes y sanas y sin romperse ninguna 🤩 recomiendo totalmente