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they only take 1 pint. but if they really have to they take 2 pints, but that's if they HAVE TO!! but if they do take 2 pints they will give you some thing to eat and drink like a cookie or juice, that way you don't pass out. they cant take any more because if they do u will be very sick.

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12y ago
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13y ago

Most allergy testers do not take blood for allergy testing.

They use a syringe and needle to poke a tiny bit of a refined, purified allergen (chocolate, Oranges, barley, certain fruits, etc) into spots going up and down the back of your upper arm (the least likely place to be rubbed on in your daily activities).

Most of these little test locations will develop a hive or welt. By measuring them all they find the ones that are over 12mm in size. Any larger welt is considered to be the result of an allergen . . . that is, something that you're allergic to.

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Q: How much blood do they take for allergy testing?
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