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Old 01-29-2019, 08:56 AM
 
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I've had a food allergy test done via blood work and it said i had no allergies, but I sometimes feel like I could have an egg allergy. Is it possible to have a food allergy or intolerance even if the blood test says you don't?


A second question - can you develop food allergies from eating the same thing over and over again?
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Old 01-29-2019, 09:00 AM
 
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Intolerance yes, allergy no.

You can develop a food allergy at any time, whether you eat it or not.

Try cutting it out of your diet (look for hidden sources including lecithin, etc.) for 2 weeks and see how you feel.
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Old 01-29-2019, 10:12 AM
 
Location: stuck in the woods with bears and moose
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If you become allergic to a food, it will often be something you eat over and over. That's why the common food allergies are milk, wheat, nuts, eggs--things people eat all the time.

Maybe you could get tested by another allergist or talk to your own about food intolerance. There's a difference between an intolerance and an allergy.
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Old 01-29-2019, 10:41 AM
 
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Quote:
Originally Posted by in_newengland View Post
If you become allergic to a food, it will often be something you eat over and over. That's why the common food allergies are milk, wheat, nuts, eggs--things people eat all the time.

Maybe you could get tested by another allergist or talk to your own about food intolerance. There's a difference between an intolerance and an allergy.

Why do you think that is? Why does the body become allergic to something eaten over and over again?


I feel like back in the day, people probably ate the same thing over and over again as they could only rely on the food that was near them (like hunter/gatherers), so wouldn't we be more designed to eat the same thing everyday compared to variety?
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Old 01-29-2019, 03:22 PM
 
Location: stuck in the woods with bears and moose
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Quote:
Originally Posted by bell235 View Post
Why do you think that is? Why does the body become allergic to something eaten over and over again?


I feel like back in the day, people probably ate the same thing over and over again as they could only rely on the food that was near them (like hunter/gatherers), so wouldn't we be more designed to eat the same thing everyday compared to variety?
I don't know. Probably my allergist explained it to me a long time ago but I don't remember. I was a milk addict. I became allergic to milk. I do remember my allergist saying that it will be something you eat all the time, maybe one of your favorite foods.
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Old 01-30-2019, 10:09 AM
 
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Originally Posted by in_newengland View Post
I don't know. Probably my allergist explained it to me a long time ago but I don't remember. I was a milk addict. I became allergic to milk. I do remember my allergist saying that it will be something you eat all the time, maybe one of your favorite foods.

Yeah, I've heard that too - so strange to me!
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Old 01-30-2019, 02:27 PM
 
Location: on the wind
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Quote:
Originally Posted by bell235 View Post
Why do you think that is? Why does the body become allergic to something eaten over and over again?


I feel like back in the day, people probably ate the same thing over and over again as they could only rely on the food that was near them (like hunter/gatherers), so wouldn't we be more designed to eat the same thing everyday compared to variety?
Here's a good explanation:

https://www.hopkinsmedicine.org/heal...stem_85,P00039

You can be intolerant to a food but not allergic to it. Different mechanisms.
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Old 01-31-2019, 05:11 PM
 
Location: San Antonio, TX
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Quote:
Originally Posted by bell235 View Post
I've had a food allergy test done via blood work and it said i had no allergies, but I sometimes feel like I could have an egg allergy. Is it possible to have a food allergy or intolerance even if the blood test says you don't?


A second question - can you develop food allergies from eating the same thing over and over again?
Blood tests can have a false negative (or even a false positive), because they generally only test the most common proteins in the food. Skin prick testing is more accurate.


You can also have allergic reactions to food that are not IgE moderated, and those won't show on an allergy test. I have MCAS and none of the foods I react to test positive with a blood test. My skin is too reactive for the skin test (I react to the saline control.)
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Old 02-04-2019, 06:00 PM
 
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Hi,
don't treat the blood test as conclusive. Get a skin prick test. Also, see multiple allergists for testing. I did that & my results varied.
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Old 02-04-2019, 06:04 PM
 
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Quote:
Originally Posted by Hedgehog_Mom View Post
Blood tests can have a false negative (or even a false positive), because they generally only test the most common proteins in the food. Skin prick testing is more accurate.


You can also have allergic reactions to food that are not IgE moderated, and those won't show on an allergy test. I have MCAS and none of the foods I react to test positive with a blood test. My skin is too reactive for the skin test (I react to the saline control.)
Can you explain about this? What is MCAS? What causes the reaction to saline control?
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