Whereas, a food intolerance is totally different.
It usually comes on gradually, will only happen if you eat a lot of that food or you eat that certain food too much. Symptoms include nausea, stomach pain, diarrhoea, fatigue, and vomiting.
Some foods that are really popular in causing intolerance arepeanuts, walnuts, pecans, almonds, soy, wheat, gluten, egg whites and fish/shellfish and if you are intolerant to foods containing sulphites then that might even trigger an asthma attack.
A food intolerance disturbs the whole chemistry of your body and even the whole Autonomic nervous system.