I sometimes get cravings for salt, or milk, or OJ, which I indulge on the basis you've stated. It isn't clear I could fool my body with the wrong thing though.

I sometimes get cravings for salt, or milk, or OJ, which I indulge on the basis you've stated. It isn't clear I could fool my body with the wrong thing though. My milk cravings for example, I don't know what nutrients my bodies after, but my body does, and presumably my body will know when it's got it, so the fact that I've recently drunk some white liquid shouldn't matter. I assume that as I don't consciously know what my body is after, my body also isn't influenced by what my conscious thinks its consuming.