How much chocolate would kill a human?

200mg can kill you because it contains a poison chocolate is good for you in small quantities and you don't want to eat too much because when you start to feel sick it means you are starting to poison yourself and you don't want to be doing that when you start to feel sick you should stop eating the chocolate otherwise you might end up in hospital very Ill and you might kill yourself so don't' eat too much and be safe of how much you eat........