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ProStrong Advanced Fluoride Strengthener Duo
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ProStrong Advanced Fluoride Strengthener Duo

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What is it: A highly concentrated fluoride treatment that helps harden nails.

Who is it for: Anyone who wants stronger nails.

Why is it different: This set includes two bottles of the fluoride strengthener.

How do I use it: Apply it on bare nails or polished nails. It will bond with the natural calcium in your nails to harden them.

From ProStrong(R) Nail Care.

  • Includes two 0.5 fl oz bottles of ProAdvanced Fluoride Nail Strengthener
  • Cannot ship to AK, HI, VI, PR, Guam
  • Made in USA

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A312297 — ProStrong Advanced Fluoride Strengthener Duo

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ProStrong Advanced Fluoride Strengthener Duo 4.3 5 39 39
You Nailed It! I had a HORRIBLE experience with gel nails that left my natural nails weak and tissue thin. I never thought I'd have healthy nails again. I tried several different products claiming to restore nails damaged by using gel nails and tips...nothing worked...until I used ProStrong products. I never had super strong nails anyway but ProStrong Floride treatment along with the Calcium treatment have strengthened my nails considerably. I'm a true believer in ProStrong and highly recommend their products. If they could help MY nails in the condition they were in, they can help yours! Please note though that I used it faithfully at least twice a day at a minimum for several weeks before I saw a dramatic change. If you can't commit to doing it long term, it may not work for you. I won't use anything else now. 06-02-14
Amazing Results This product has given me Amazing results in a short period of time! I have always had weak, peeling nails. I have spent tons of money on products and nothing worked. I decided to use this the first week with no polish or nail hardener on. By the end of the week some nails had grown to the point of having a free edge extending beyond my finger tip! Shocked. The second week I used it over my Polish twice a day and I can hear my nails on my keyboard as I type. I would add this to my "desert island" make up bag!! Love it. It saved my nails. 03-10-14
Awesome Product I remember seeing this product on QVC years ago but at the time I didn't need it. When I was young my nails grew very easily. After I had my children my nails became weak and would bend very easily. I remembered this product and ordered it. After two weeks I began to see a difference. I have been using this for a year and would not be without it. I use it twice a day on bare nails and over polish. For those who say it doesn't work I would give a few tips. First of all use it regularly. At least twice a day. It drys quickly so it's not an inconvenience. Second, I keep it in my purse so that I can use it at any time. It doesn't have an odor so it will not bother other people. Most importantly recognize you will always need this product. Don't use for a period of time and then stop or skip days. If you do your nails will become weak again. My nails have returned to what they were like when I was in my twenties by using this product. I am so glad I don't have to use acrylics or gels which are so damaging to the nails. I hope QVC never stops selling this product. 11-20-13
Don't ever stop selling this product I have used this for many years and I never want to be without it. I could never have long nails until I used this. I love having longer nails and. it is helpful for sewing. Thank you for all the products but this one I love the best. 11-17-13
Nail "Strengthener" I have been applying this product to my nails every day for a month. My nails are drier, more brittle and peeling and breaking worse than before I started the treatment. Based upon my experience, I would not recommend this product, but due to the cost of shipping, I will not return it, but will discontinue its use. 11-04-13
It WorKs I've been using this product for about 1years and found a big difference, when I get lazy and don't use it my nails go back to the wimpy easily bent and snag . I don't use polish but I do like long health nails. ~ When I use this great stuff on the surface and the flip side they are strong and get the French manicure look without anything but this stuff ~ IT AMAZING ... Who knew that Fluoride not only make your teeth stronger but works Wonders on nail. 10-12-13
Have patience, this works! I have written reviews about this product in the past so I am mainly writing this time because for some reason this product cannot be ordered automatically. It's not that big of a deal to wait on the phone until a representative can help, but it does take more time, so I'm wondering if anyone is aware of this and can do something so it can be ordered automatically? Other than that, the product is great and has helped my nails immensely! I had a nail that would split after it got so long, but I don't have it anymore! It took awhile, but my nail no longer splits and my nails look healthy. Thank you Pro Strong and please don't stop making this or change the ingredients. 07-10-13
Unhappy Nails I was hoping this will help my nails, but not really. My nail beds became whiter, but my nails kept on breaking. Only a few grew. I was very disappointed with this nail strengthener. I had to return this back. 07-08-13
This Stuff Really Works I have tried many otc and Q products but this is, by far, the best strengthener. It made a real difference to my dry, brittle, splitting, ridge-filled 68 year old nails in less than a week. Ridges still show but are considerably shallower and the nails are much smoother and stronger. A real bonus is that it is instant dry. I can't help with the polish since I don't like color on my nails. If Prostrong would make a product to remove stains under the tips and in the ridges, it could put a serious dent in my budget! 06-29-13
COULD NOT BE WITHOUT IT I've been buying this for years from QVC & have never written a review--I just keep reordering it because it works. It is also the perfect primer. I keep my hands in water a lot & splitting & pealing is a big problem for me--if I use this product consistently, it keeps my nails from splitting & pealing. Hope QVC never stops carrying it. 04-30-13
WORKS, BUT NOT FOR USE WITH NAIL POLISH This product works very well and absorbs quickly into the nails. However, it makes your polish peel off, even gel polish, which has been properly cured under an LED or UV lamp, does not last. If you are not using nail enamel, go ahead and purchase this. However, do not not try to use this over nail enamel or you will end up redoing your nails over and over, which is the whole point of having gel nail polish in the first place, because it is tough and does not peel or chip away. I did see my nails growing a lot faster and getting stronger. However, because of the polish issue, I will not be using this on my nails, but will stick with Genadur, the prescription nail solution my dermatologist recommended for me. You can use that over nail enamel and it will not peel. 12-29-12
It Works-Have patience. My nails lifted from the nail bed which I thought was due to my thyroid. I used prostrong 2x a day for 3 months on bare nails while the entire nail bed grew out. You need patience it does need time to work. My nails are definitely stronger. I decided to polish my nails again. BIG MISTAKE! Within 2 weeks of polishing my nails the nails lifted from the bed again. Obviously a reaction to nailpolish not the thyroid. Back to using my Prostrong 2x a day on bare nails. My nails are still very strong and the nail beds are healthier than when I first started so I'm hoping the recovery will be shorter this time. 11-07-12

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