The denomination rules, chemical essence and structure of allergen as well as irritability, elimination and control of food allergen were reviewed.

介绍食物过敏原的命名规则，综述过敏原的化学本质、结构及其对过敏性的影响，并介绍食物过敏原的消除与控制方法等。

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As a result companies play it safe and put warning labels on products that may not in fact contain high enough levels of allergen to have any effect.

结果，为稳妥起见，公司为产品放上警告的标签，而那个产品中也许其实并不含有会产生后果的足量过敏原。

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Dr Nicoletti said delivering an allergen, such as peanut, alongside the interleukin-12 molecule. may help to bring allergic reactions back under control.

BBC: NEWS | Health | Food allergy molecule discovered

In addition to any potentially toxic effects, fragrance is routinely listed as a substance to avoid as a potential allergen, for both adults and babies.

FORBES: File Under Ridiculous: Perfume for Babies

That means when they come into contact with an allergen, the immune systems do not destroy it as they should.

BBC: Asthma vaccine hope