I had a really nice email from an old friend of mine in Canada, Shanly. She thought I would like to try a nail product as I have been having problems growing mine - she swore by it as well as her mum and sister in law too!
It's called Perfect Formula and I am not sure if anyone out there has tried as well but I would love to know if it worked for you. It seems to be a North American product and I was having trouble finding but QVC online has it. It's not cheap at £20.25 + £4.00 posting and packaging but I will give it a go because Shanly is an actual makeup artist and therefore she knows what she's talking about. The reviews all seem good as well.
If you're in Canada or the U.S. - Sephora sells it as well as most shopping channels.
Perfect Formula Strengthen & Seal Sheer Pink Gel Coat
There is also this if you don't want any colour:
Perfect Formula Strengthen & Seal Gel Coat