Lettuce tea is said to be good for insomnia. Has anyone tried it?

I read in an article that Kang Su-ji suffered from insomnia.

After receiving various help, he is now free from insomnia.. and his complexion has also improved..

Among them, the lettuce tea part caught my eye...

Has anyone ever tried lettuce tea??

This is my first time hearing about it...

I searched it and it seems to be really helpful...

There are tea bags and powder...

In some articles, they even say to boil lettuce with real water...

I'm interested because my mom has insomnia.