There are soooooo many nutrition books, and diet books on the market. It can be a bit overwhelming and confusing for a beginner like me to sort out the junk science, and voodoo gimmicks, from the well respected books, and web sites. In the last couple of years I've been extremely tired, sleepy and fatigued for some reason. I've never really been into the nutrition thing, so I would appreciate any of your recommendations on good nutrition, and advice on the following: 1) Sodium. What's the story? How much is too much. How little is too little. Is it true...