What vitamin deficiency can cause ridges in finger nails?

I've recently noticed that my fingernails are starting to get ridges in them. They are verticle ridges from tip to cuticle. My pinkies and ring fingers seem to have it most. I vaguely remember reading something many years ago that a vitamin deficiency can cause this to happen, but I dont remember which one it was. I was just wondering if anyone out there has ever heard of this? Thank you :-)

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