Hi
It's 5 hydroxytryptophan . It's a supplement that works like an Ssri medication. My naturopath put me on it. Depending on what you need it for you start out fifty milligrams a day and you can go up to 300mg it helps with anxiety and depression although it takes a bit of time. It does not give you side effects like drugs for depression. I have stopped it after three years with no bad side effect symptoms. Since being taken off my hormones , i'm still struggling to get the right dose. It does help with sleep. Find a good naturopath