The amount that is actually effective is too large to have it with food, and you're likely to puke this kind of food anyway. Just because something could be deadly occasionally (food salted with SN) doesn't mean that it's a viable method.
Maybe it's just not a method for you. Even the "holly graal" of everyone here, Nembutal, tastes awful (bitter). We don't have a method that would be actually pleasant, you know. Because our bodies want to live, and actually protest when we're trying to do something deadly.