Instruct: Classify Amazon reviews into positive or negative sentiment
Query: better sleep

This product does help me to sleep longer than I was sleeping before. There are issues with taking 5-HTP that a person should consider before beginning use. I do not claim to know all the information and I will not go into great detail, but the main side effect that I have noticed is an increase in headaches. When beginning use I had headaches more often than usual but they did subside after a week or two of regular use. I stress regular use because once your body becomes adjusted to the use of 5-HTP you need to take it regularly. If I miss a dose I get a headache again.