5-HTP was actually prescribed to me by my doctor to help me get to sleep at night, a few years ago. My doctor recommended that I take it a little at a time throughout the day, as opposed to taking it at night, right before bed time. The idea was to get my body into its proper rhythms. I decided to get some Now 5-HTP because I had used this brand for other products, and found them to be trustworthy.Once I had some, I did as the doctor said. This did help me to be more relaxed in general, and it improved my mood as well. When I was going through a tough ordeal, and needed help with anxiety, this really helped me to stay calm and less worried. I was able to get things done, that I wouldn't have been able to, due to harried nerves. However, it didn't keep me from having sleepless nights. I still tossed and turned. If you only have mild bouts of sleeplessness, this might work as a sleep aid for you, but if you are a serious insomniac like me, you might need something a bit more potent.