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

卵黄中有一种质叫卵黄生成素。

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

与觅食者相比，这些转变工含有更高水平卵黄蛋白原，这是一种与长寿相关多用途蛋白质。