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

黄中有一种重要黄生成素。

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

与觅食者相比，这些工蚁体内含有更高水平黄蛋白原，这是一种与长寿相关多用途蛋白。