Chocolate contains a mixture of ingredients. The main ingredient is typically cocoa powder, which is a processed version of the cacao bean. This powder is then mixed with sugar, fat, and emulsifiers, such as soy lecithin. If the body is allergic to cocoa, the immune system will respond when it enters the body. This response can create symptoms such as: hives, trouble breathing,swollen tongue, lips, or throat, a wheezing cough, nausea or vomiting, stomach cramps