Look especially into mercury poising from your teeth. Get your silver filing taken out and also since your an RN you probably get flushots and everything else which has Mercury in it! Its a deadly killer.
Look into taking Codliver Oil which will help. More info is at this site http://www.Mercola.com type in mercury. Cod liver has Vitamin A and D.
Another food would be chlorella which is a good food and detoxifies your body of heavy metals.