Yes, I've taken it before, for sleep, and it did help. It's supposed to be needed for the production of serotonin. Most doctors will tell you, though, that it shouldn't be taken with an antidepressant, so I guess I was a little afraid to keep taking it long-term.
I used it, I was having trouble sleeping some months ago, it really works, but it also depends on how well your organism reacts to it. I'm now trying a more natural approach... I watch some ASMR videos before bed and I take vitamin B complex. That's helping me a lot That and medical marijuana