I tend to have low sodium levels myself and was just advised to add salt to my food if I feel the effects. In summer I've been known to add a small pinch of salt to my tea - doesn't take much. Funny thing is, if you need it you can't taste it which is an easy way to test and why giving salt orally isn't so strange. I think I'd balk at a teaspoon full in lemon juice though. Euwww!