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Foodintolerance

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Foodintolerance

Postby har0bed1813 » Mon Aug 01, 2005 11:24 pm

What exactly causes people to be intolerant to a certain foodtype, for instance citrusfruit? What biological process, in small steps, leads to rapid expellation of bowelcontents after the intolerable substance proceeds from the stomache to the bowel?
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Postby Dr.Stein » Tue Aug 02, 2005 2:03 am

I think it has a relationship with vagus nerve. The food, usually with strong taste, will stimulate the vagus nerve to work, i.e. contraction and relaxation (peristaltic movement) of GI tracts.

I myself suffer a lactose hypersensitivity, my doctor told me so. Soon after I drink my milk up, I will get a terrible stomach-ache (queasy) and then I will throw up (sorry). I am not sure about the mechanism, but I think it seems like what I explained above.
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Postby mith » Tue Aug 02, 2005 4:04 am

Most asians also do not have the ability to digest milk(lactose). Historically, their diets didnt have dairy products.
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Postby Jokkon » Tue Aug 02, 2005 4:48 am

a british once told me that she cannot digest rice?
i wonder if that includes all the starch types of food, like potatoes and stuff?
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Postby Jokkon » Tue Aug 02, 2005 5:00 am

mithrilhack wrote:Most asians also do not have the ability to digest milk(lactose). Historically, their diets didnt have dairy products.


because once ppl reaches puberty, (maybe? :?: ?), their body stops priducing lactase in the small intestine, and milk goes right thru the other end?
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Postby har0bed1813 » Tue Aug 02, 2005 11:26 am

I myself cannot tolerate citrusfruit, but as far as I know you don't need a special enzyme to digeste that!
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Postby Dr.Stein » Tue Aug 02, 2005 1:14 pm

Perhaps your stomach is too sensitive for citrus, so it will trigger the reflex system as I told you...
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Postby Jokkon » Tue Aug 02, 2005 8:08 pm

har0bed1813 wrote:I myself cannot tolerate citrusfruit, but as far as I know you don't need a special enzyme to digeste that!


but u need lactase to breaks lactose in milk? i think so, just like u need sucrase to break sucrose
I am just a high school student
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Postby Dr.Stein » Wed Aug 03, 2005 2:01 am

I think what he/she means is that he/she does not need enzyme to digest citrusfruit.. Citrus also contains sugars as well, so you still need enzyme to digest it. I think there is none who sensitive for this enzyme ;)
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