

💅 Nail rehab that means business — stronger, healthier nails, no compromises.
Nail Tek Formula 4 Xtra is a protein-enriched nail strengthener designed specifically for weak and damaged nails. Infused with hydrolyzed wheat protein and calcium, it repairs, hydrates, and fortifies nails to prevent breakage and promote natural growth. This scientifically formulated, toxin-free treatment offers flexible use options and enhances polish adherence, making it a top choice for professionals seeking durable, healthy nails.
















| ASIN | B0D55HN8WJ |
| Best Sellers Rank | #14,942 in Beauty & Personal Care ( See Top 100 in Beauty & Personal Care ) #30 in Nail Strengtheners |
| Customer Reviews | 4.4 4.4 out of 5 stars (7,143) |
| Manufacturer | American International Industries |
| Package Dimensions | 6 x 2.5 x 2.5 inches; 1.59 ounces |
| UPC | 709967378275 |
C**K
This product works, worth it
This is a great value for what you get. Two nail strengtheners that actual work. The coating stays on even with extreme work. I was able to have mine stay on for about a week before it started to peal off or get damaged and I work with a lot of tools. It also helps keep your nails looking clean and nice while it does the work strengthening and growing your nails. This also helps me not bite my nails knowing there is someone on it. Overall great product and I’m seeing a difference in my nails.
K**.
Fingernail Help!
I have been struggling with nail breakage for several years and have tried vitamins, supplements, collagen, etc. in attempt to improve my nail health with no success. A few months ago I was getting a mani/pedi and the technician used one of the nail products from Nail Tek on my fingernails when I told her about my nail breakage issue. It really seemed to help so I looked for it online and found the whole line of Nail Tek products. I ordered this nail strengthener and immediately started using it. My nail breakage has definitely improved. While I am being cautiously optimistic still, I really think I found the solution with the product.
T**Y
Really works!!
I recently had my artificial nails that I’ve had for many years removed. My original nails were left looking a horrible mess and I had no idea what to do. I decided to try this product and I was pleasantly surprised with the results. After several coats over 2 days it filled in the ridges and left my nails with a high glossy finish. I would definitely recommend this product to anyone looking for something to help repair badly damaged nails. I wish I had taken pics before applying, however I’m posting pictures after using for 2 days. My reason for the 4 star review is because the odor is quite strong.
E**N
Great product
Love this!
A**R
Works great!
I rarely do a product review but this nail polish has been amazing. My nails kept breaking and flaking. Nothing helped. My doctor had no advice. I've been wearing this for 2 weeks and my nails are significantly stronger and they stopped breaking and flaking. I highly recommend it!
C**O
No muy bueno no hizo el efecto que recomendaron .
K**R
If you rock natural nails this product is amazing!
I grow my own nails with the help of this NailTek! I've used this product for years and recommend it to anyone who wants to go natural. It works very well and quickly. I use it as a treatment and as a basecoat. I go through phases when my nails are really good, then I use it as my basecoat. When my nails go through a rough phase, I use it everyday as the direction indicate. There are different formulas but I just use the extra and cover all the bases! Excellent product and this is an exceptional deal! At my local beauty store this bottle is nearly $15, here I basically get 2 bottles for that price! A bottle will easily last 6 to 8 months.
A**Y
Bueno
E**A
Ottimo prodotto per unghie fragili! La uso sia da solo che come base per lo smalto colorato e le unghie sembrano decisamente più sane!
A**L
Loving this product. Notable difference after a week. Long term worth, to be updated at a later date
V**O
Es lo mejor, MUY RECOMENDADO Me puse uñas de acrílico y me las terminé arrancando Mis uñas quedaron frágiles y partidas Muy delegaditas como papel, se doblaban y dolían Me puse de todo y nadaaaa.!! Me puse este fortalecedor y en 2 semanas mis uñas eran más fuertes y se les quito esas rayas blancas RECOMENDADISIMO ⭐️⭐️⭐️⭐️⭐️
K**E
I hardly write reviews but for this I have to do it. It’s a miracle product, I have used it for just 3 days and my nails are perfect. My nails were severely damaged, thin and peeling due to removing gel, it was so bad, I could feel pain if I touched my nails and would feel heat through my nails if I put them in hot water and would bend if they grew slightly. Now my nails are nearly perfect. No longer bend when making my bed and no pain the touch and in cold water and it’s only been 4 days. I’m in awe.
A**I
J'avais des ongles particulièrement abîmés tordus et rongés. Apres 2 semaines de traitement(plus ou moins régulier en plus) mes ongles ont bien meilleure allure, même s'ils sont toujours tordus ils sont clairement moins abîmés et plus durs. Je recommande!
Trustpilot
2 weeks ago
5 days ago