I'm very curious how, and in which areas,our FINGERNAILS can reveal info. about !

I'm very curious how, and in which areas,our FINGERNAILS can reveal info. about our general health.Anyone?

I once read an article, stating that examining the condition of your nails, can offer information and insight, into the state of our over-all health?

I have vertical ridges on my finger-nails, that I can visibly see, and even slightly feel, and dark brownish-black horizontal lines about 1cm long. Does anyone have information as to what these could possibly mean? Anything else relevant on the subject , would be of great interest to me also, and very much appreciated. Below, is a brief outline of my current Physical and Emotional health. Is there a direct correlation between anything here, and nail condition?
PHYSICAL -
I try to maintain a healthy diet, incorporating moderate exercise, a reasonably healthy diet (not impeccable) and take supplements Iron, Vitamin B Complex, and Omega 3 Fish Oil Capsules on a daily basis.
EMOTIONAL-
I am a Mum of 3 kids under 5, have a severe Anxiety Disorder, and struggling with a decison to leave my Emotionally Abusive husband,who won't accept help.

I found this, for starters: http://www.healthy.net/scr/healthhint.as...

Or try here http://www.associatedcontent.com/article...