I agree with SpiritOfTheRabbit. I've been taking Biotin for a few months now. It has seriously improved the quality of my nails. They're stronger, break less often and are much longer. They do seem to be growing quicker too.
Take Biotin supplements they help with your Nails, Hair, and SKin.. I take one every single day :)
Id love to know both my hair and nails grow way too fast =/
Good blood flow...thirded or fourth with the biotin supplements
Seems biotin has it, I was going to guess milk
Time and eat lots of fruit