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Tim Harlan, M.D.

Tim Harlan, M.D.

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Food Allergy: Does Your Child Really Have A Food Allergy?

Posted: 11/28/10 08:30 AM ET

Children with Atopic Dermatitis have skin that becomes red, scaly or flaky and very itchy in response to irritants. These irritants can include foods as well as environmental factors, like certain fabrics or even cigarette smoke. It appears that food allergies can contribute to Atopic Dermatitis, although we know that they are not the cause of the condition. About 80 percent of those who develop Atopic Dermatitis show their first symptoms before they turn five, which makes managing the condition a real concern for parents.

The best way to diagnose food allergies is with the scratch test: the extract of a possible allergen is applied to the skin and then the skin is pricked or scratched to introduce the allergen into the body. If the skin reacts to the scratch in a certain way, it's considered a good indication that the person is allergic to that allergen. Now that it is possible to perform blood tests for certain allergen antibodies, these blood tests are even more often used to diagnose food allergies than scratch tests.

The problem, however, is that scratch tests and blood tests are considered to be conclusive evidence of an allergy only for cow's milk, hen's eggs, fish, peanuts and tree nuts. A gluten allergy diagnosis, for example, is only considered conclusive after a biopsy of the small intestine -- antibodies are indicative but not conclusive. However, the most conclusive test for all other food allergies is quite simple: Can the food be eaten without triggering an immediate, clinical reaction?

Researchers from the pediatric departments of the National Jewish Health center in Denver along with the University of Colorado became concerned after noting that more and more children were being diagnosed with food allergies. With the best of intentions, parents were following their doctors' instructions and removing foods from their childrens' diets, in some cases leading to malnutrition and poor weight gain in the children. What if the diagnosis of a food allergy was incorrect and the children could eat those foods?

The researchers reviewed the charts of 125 children who had been avoiding a particular food due to an allergy that had been diagnosed through a blood test but then underwent an Oral Food Challenge (actually ate the food under controlled conditions). All of the children had Atopic Dermatitis and 96 percent of them had active symptoms at the time of the test -- many of them considered severe.

The children had been diagnosed with allergies to many common foods, from milk to vegetables to soy. After the Oral Food Challenge, at least 77 percent of the children were found to not be allergic to the food being tested.

If you or your children have Atopic Dermatitis and are avoiding foods based on a blood test alone, discuss taking an Oral Food Challenge with your physician. You may be avoiding a food for no reason.

 
 
 

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HUFFPOST SUPER USER
Tresco
Sistagirl Laughin' Thingy Award Winner!
11:00 PM on 12/01/2010
I remember the big peanut scare of a few years back. Schools were treating peanut butter sandwich like a WMD.
11:44 PM on 12/01/2010
Just because some kids get misdiagnosed, doesn't mean that food allergies aren't still a life threatening condition for kids who actually have them.
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sabelmouse
my micro bio is emty
06:28 AM on 11/29/2010
there are certainly other reasons for allergies. i developed a spice allergy a few years ago. my throat would swell up painfully if i barely even came near a spice especially peper and chilli.
turned out it's my liver not working and now that i am on my '' i love my liver '' diet i can dring tabasco straight,

have to keep my liver happpy though.
no sugar, tea, coffee, refined foods.
a good basic wholegrain diet lowish in fat and low in protein and i am so much better.
not nessesarily vegan or vegetarian though. just in case somebody thinks that. just not a lot of protein.

as for skin problems. i have always had them. i react strongly to laundry detergents and cosmetics. being carefull there lso benefis the liver though.

it's amazing what the liver does do and how many environmental poisons it has to cope with.
lot's of things make me fell sick an that has made me even more aware of what we use in cleaning, painting, carpets, furniture , airfresheners, deodorants.
there is plenty there to give all sorts of problems.
12:32 AM on 11/29/2010
Most times, the human body already knows what it is allergic to, and the body will tell you. If you have problems with a certain food or foods, then your body is already telling you something that you do not need an allergist to tell you.

Listen to the signs that your body freely gives you. Your body is so much wiser and so much more experienced than any allergist and than any other professional.

Listen. Just listen and you will have all your answers , specifically geared towards your own body and your own good health.
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HUFFPOST SUPER USER
onwisconsin
Trust women; protect choice.
10:44 PM on 11/29/2010
My body tells me by having my blood pressure drop, my throat and tongue swelling, causing me to not be able to breathe (anaphylaxis).

My doctors give me an EpiPen. I love my doctors. Without them, I wouldn't be alive.
10:26 PM on 11/30/2010
You sound kind of like a hypochondriac. And a little bit melodramatic. Perhaps you should try yoga and relaxation.
02:22 PM on 11/28/2010
My daughter, who is now 36, has always disliked Italian foods. Always threw up after Thanksgiving dinner. Well, last year, she went to a very fancy Cajun restaurant in our city, and after eating dinner, her lips and tongue began to swell. She knew the Chef, so asked him what unusual thing was in her food. They couldn't figure it out. The next week, her college where she works, had a catered event by this Cajun Restaurant. She ate some alligator, deep fried, and had dipped it in tartar sauce. Again, she swelled up. The only thing the same in her restaurant dinner and this catered deal was thyme. Thyme in the tomato soup, thyme in the tartar sauce. She checked with her doctor and the reason she didn't like italian food? Thyme in italian spices. Thyme is in poultry seasonings at Thanksgiving. She has an epipen and keeps benadryl in her purse. Who would have thought?
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HUFFPOST SUPER USER
Sharon Hanson
Skeptical of the *pseudo-skeptics*
11:22 AM on 11/28/2010
I don't have much respect for National Jewish Health or the University of Colorado, my experience, my opinion. Their studies center on causes that can be blamed on the patient vs. environmental which I believe most of these new diseases are coming from - that is toxins we are exposed to in a myriad of ways relentlessly and exponentially.
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Elrancho2
Nature boy
10:37 AM on 11/28/2010
I find it hard to believe that people really have quite as many food allergies as they claim. Much of the time I feel the media pushes it to the extent people become neurotic and it all becomes a bit ridiculous. Of course there are genuine, proven cases out there but I suspect for some people it's a fad.
09:46 AM on 11/29/2010
The question becomes 'some' or 'most'. I have asthma. Every couple months, I try going off ad-vair just to see if I'm still allergic to cat hair and dust. I still am, so I go back on my ad-vair.

My husband is a celiac and got the blood test. Even without the test, not consuming or coming into contact with wheat improved his health by leaps and bounds. The day he gave up wheat, he started improving. Days he slips and accidentally consumes a crumb of wheat, he's in pain for five days. That said, at one point in his life he tested positive for allergies to bananas, raw onions, mushrooms and like, 2 other things, that he has since 'gotten back' and when re-tested and is no longer allergic to them.

I can understand when someone is told their 2 year old is or could be deathly allergic to peanuts, they won't try the oral challenge.

I disagree that it's a 'fad' - it's not fun to be allergic to anything. The stress of having to avoid places to eat because they can't be sure they can exclude the allergen sucks.
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Elrancho2
Nature boy
10:39 AM on 11/29/2010
I wasn't saying for everyone it was a fad but I believe it is for some people. Obviously, it isn't for you and your husband and I sympathize with anyone who truly has to live life avoiding certain foods. I come across this problem a lot because I'm in the business of serving food.
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HUFFPOST SUPER USER
Skye
01:18 PM on 11/29/2010
I think some folks with atopic dermatitis or hives with no apparent cause are often anxious to find something.....anything that might offer an explanation. I developed both atopic dermatitis and hives as an adult and I'm constantly convinced it's a food causing the outbreak although I've been through some extensive testing. I guess I'm hoping it's food related so I can avoid the culprit and maybe get some relief.