Different kinds of food allergies are predominant in infants, while many adults are also found to be allergic to certain food items. Broccoli is one such vegetable, which can produce undesirable reactions on being consumed by an individual allergic to it. An allergy to broccoli appears when the immune system of the body wrongfully assumes that broccoli is a foreign substance, and can be harmful for the body. The immune system, in response, produces antibodies, which results in the appearance of certain symptoms. The allergy to broccoli can be easily detected and hence avoided, by carrying out a simple skin test.