Foodintolerance

[har0bed1813]

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?

[Dr.Stein]

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.

[mith]

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

[Jokkon]

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?

[Jokkon]

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?

[har0bed1813]

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

[Dr.Stein]

Perhaps your stomach is too sensitive for citrus, so it will trigger the reflex system as I told you...

[Jokkon]

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

[Dr.Stein]

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