here. Fluoride based nail treatments are part of a greater category of Nail Hardeners. See links below:
Categories of Hardeners and Formaldehyde
Are Formaldehyde Hardeners right for you?
Protein Based Hardeners
Formaldehyde + Protein Based Hardeners
Formaldehyde or Protein Based Hardeners + Moisturizers
Fluoride Based Nail Treatments Part I
Dimethyl Urea Base Hardeners
Nail Conditioners Post or Video
Now on to the post ...
There are only a few products that contain fluoride:
ProStrong ProAccelerator Fluoride Nail Strengthener
Barielle - Fortifying Nail Builder
Almay Organic Fluoride Line (these I believe are discontinued, but I still see them online)
It has been a looooong time since I used either the Barielle or Almay ones, but have always gone back to prostrong for various reasons, mainly because it's easy to obtain, use and it works. Since I prefer Prostrong, I will discuss the Pro Accelerator in greater detail.
Prostrong Pro Accelerator
I like the Prostrong fluoride accelerator because it's NOT like a nail polish. The treatment is a liquid, alcohol based, and can be applied to either dry clean bare nails or over dried polished nails and the treatment is just as effective. The alcohol evaporates immediately. You start off applying it twice a day and can cut back when your desired hardness is achieved. Some people may be concerned about the alcohol base, which can be drying, but that is why I seriously stress moisturizing, both with this treatment and in general nail care.
Problems and Concerns:
I have used this product (and still do on occasion), but feel, similar to formaldehyde, it can over harden the nail plate. However, I think it takes much longer before a fluoride based treatments over hardens the nail plate vs. formaldehyde based treatments. I would say after about 6-9 months of using Prostrong I start to taper off. As such, it's more difficult to over harden the nail plate with fluoride based treatments.
I suppose like any nail product there is a chance of skin irritation, but I have never experienced this.
Where I buy it:
In my experience I have found it is best to order off the ProStrong website rather than QVC because it's cheaper (that is unless QVC is having a sale/special). I usually get the "Proaccelerator Mini bottle with Bonus size Refill". It's 0.75oz + 0.125oz for $19.5. That is ~$22 per ounce of product.
Although this product worked for me, not all nail conditions are created equal. The proper choice of treatment must be based on your own nail condition. In order to determine whether this product can help you see Part I.
Next Up: Dimethyl Urea Base Hardeners