While everyone is talking about supplements, I urge you to follow the link Posted by Auntie Audrey in this Vitamins Thread:
http://neurotalk.psychcentral.com/thread221650.html
You will find it an eye-opener.
As for diet, if you are stressed and Depressed and a restrictive diet is making you more so, your physical health will likely suffer. I am not saying to binge on junk, but a full, balanced diet is usually fine.
Dave.