I hate these supplements. I mean they are absolutely useless. I take one and it and I feel no different other then it gives me somewhat of a headache. I took two once and it gave me an extremely painful headache and made me feel physically ill. If I take one before bed I can't sleep. It makes me feel more anxious more than anything. The pills themselves are huge, cheap looking and uncomfortable to swallow. I don't know why these worked for other reviewers. Overall they are a waste of 8 dollars.