There's an essential ingredient in egg yolks called vitellogenin.

中有一种重要质叫生成素。

Compared to foragers, these converted workers have higher levels of vitellogenin, a multipurpose protein linked with longevity.

与觅食者相比，这些转变工蚁体内含有更高蛋白原，这是一种与长寿相关多用途蛋白质。