Instruct: Classify Amazon reviews into positive or negative sentiment
Query: celery seed

I read a medical study that showed celery extract improved memory. I have taken some supplements off and on for years, but I've never heard of celery extract being beneficial. I figured it wouldn't hurt to try it. It does not make me sick and has no artificial dyes that are evident anyway. Been taking one capsule off and on for about a month now. Has it improved my memory? Not sure yet.