My husband has a severe broccoli allergy. His reaction is similar to others on this thread. He doubles over in pain with severe cramps and he also sweats from the intense pain. Even some cross contamination with broccoli has caused a reaction with him. He has had it for at least 12 years. What we have found works for him is to take Beeno. He has to take it before he eats it. If he accidentally eats it and then takes the Beeno it doesn’t work. But if he takes it before than he is ok. So whenever we order Chinese food or Thai food he will always take Beeno before just in case.