I bought 'skin,hair and nails' too.
I have never ever had long nails. and I am an old lady.
BUT with the skin,etc,etc I now have long strong nails.
I can hardly believe my eyes.
I even had a dr. tells me once that I would never be able to have much of anything for nails because the exema on my hands was so bad that it ruined my nail beds.
I'd give the specialized vit. a try if I was You.