1, the middle jiao deficiency cold should not be eaten, the occurrence of fava bean allergy must not eat again.

2, hereditary hemoglobin deficiency, bleeding hemorrhoids, dyspepsia, chronic colitis, uremia and other patients should pay attention to, should not eat fava beans.

3, children with fava bean disease can never eat fava beans.

Fava beans contain toxic 3,4 dihydroxyphenylalanine, - cyanoalanine is a neurotoxin, toxicity, muscle weakness, paralysis of the legs and feet, etc. L-3,4-dihydroxyphenylalanine is the causative factor of sericulture disease, the disease manifests itself in acute hemolytic anemia, the patient is mostly a child, 5-24h after eating the onset of the disease. Usually heating and cooking can eliminate its toxicity.