How can someone be super allergic to eggs, but have no problem eating chicken?

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How can someone be super allergic to eggs, but have no problem eating chicken?

In: Biology
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Well, and this is probably not quite what you are looking for, but strictly speaking an egg and a chicken are not the same thing.

A fertilized chicken egg could become a chicken. But an unfertilized egg is just that, an egg. So just like you could be allergic to cat hair. In that case you’re not really allergic to the cat, but something the cat produces.

Although eggs come from chickens, chicken meat does not contain the same compounds (antigens) found in egg white.

The same way someone can be allergic to milk, but not beef. Eggs aren’t just half of a chicken, they’re nutrients for an embryo to use during development. Those nutrients don’t have the same makeup as chicken meat.