Benefits of Tryptophan supplementation?

Anyone here ever tried taking tryptophan?
Apparently, if you don't have enough of it, your body just can't soak up serotonin properly...
I went to see this specialist for some kind of advanced bioresonance testing, and they told me my tryptophan levels are totally bottomed out

Tryptophan is an essential amino acid, so you have to get it through your diet. Honestly, pretty much everything works—meat, fish, eggs, asparagus, cheese, chocolate... you name it. If you're low on tryptophan, you'll likely run low on serotonin and melatonin too, which might mess with your mood or sleep. I guess just try eating more of it.

Has anyone actually tried using this in tablet form?