Scientists do not yet thoroughly understand just how the body of an individual becomes sensitive to a substance that is harmless or even wholesome for the average person. Milk, wheat, and egg, for example, rank among the most healthful and widely used foods. Yet these foods can cause persons sensitive to them to suffer greatly. At first, the body of the individual is not harmed by coming into contact with the substance. After a varying interval of time, usually longer than a few weeks, the body becomes sensitive to it, and an allergy has begun to develop. Sometimes it's hard to figure out if you have a food allergy, since it can show up so many different ways. Your symptoms could be caused by many other problems. You may have rashes, hives, joint pains mimicking arthritis, headaches, irritability, or depression. The most common food allergies are to milk, eggs, seafood, wheat, nuts, seeds, chocolate, oranges, and tomatoes. Many of these allergies will not develop if these foods are not fed to an infant until her or his intestines mature at around seven months. Breast milk also tends to be protective. Migraines can be set off by foods containing tyramine, phenathylamine, monosodium glutamate, or sodium nitrate. Common foods which contain these are chocolate, aged cheeses, sour cream, red wine, pickled herring, chicken livers, avocados, ripe bananas, cured meats, many Oriental and prepared foods (read the labels!). Some people have been successful in treating their migraines with supplements of B-vitamins, particularly B6 and niacin. Children who are hyperactive may benefit from eliminating food additives, especially colorings, and foods high in salicylates from their diets.

The phrase "set off" is closest in meaning to______________.

Câu hỏi liên quan

• What is the main point the writer is trying to make in the last paragraph?

• The word -lethal‖ in the second paragraph probably means ............

• According to the passage, the difficulty in diagnosing allergies to foods is due to ______________.

ZUNIA12

• What is the main purpose of this passage?

• The purpose of the passage is to __________.

• Which of the following is NOT true about algae?

• In the United States, Thanksgiving is ______.

• How high is the wave of the tsunami when it reaches the shore?

• Beta blockers work on some physical and emotional symptoms because they ...........

• The word “intermittently” in line 4 is closest in meaning to .........

• The speaker’s main topic is ...................

•  According to the passage, what are two causes of declining business school enrollments?

• According to the passage, one function of the memory unit is ...............

• New immigrants to the U.S. could seek help from ______.

• The word “hazard” in the passage means ................

• According to the passage, all of the followings are TRUE except ___________.

• The word "rough"in the passage  is closest in meaning to ...........

• A “calamitous” tsunami, in line 17, is one that is _________

• In what way is Juliette’s current job better her first job?

• The word “obligatory” in paragraph 3 is closest in meaning to .........