It could become the biggest diet fad ever for those wishing to shed a few kilos.

对于那些希望减肥的人来说，这可能成为有史以来最大的减肥风潮。

So where do diet fads even come from?

那么饮食时尚从何而来？

Narrator: But juice cleanses aren't the only diet fads that don't often work.

叙述者：但是果汁净化法并不是唯一一种经常不起作用的减肥方法。