In Chris Aceto's article "10 quick tips to build mass" tip # 3 says-
3. Increase Sodium Intake
I'm not kidding. Sodium is an essential mineral that is an absolute must for muscle growth. Sodium has a bad rap because it can cause water retention - anathema to contest ready bodybuilders. On the plus side, sodium enhances carbohydrate storage and amino acid absorption while also improving the muscle's responsiveness to insulin.
There you have it sodium IS good. heres the site:
http://www.drugfreebodybuilding.com/...uscle-tips.htm