Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Product expired two years ago!!!!

I ordered Phos-Flur about two months ago and I was quite satisfied with the product. Since I moved to an area where water is not fluoridated, everyone at my family started having cavities, some of them for the firts time in their lifes.Sadly, I placed the next order from John Alexander Upperman through Amazon, and this order came in a different bottle, tasted different, and more importantly IT IS FROM A LOT THAT EXPIRED IN 2010!!!Being this a health product intended to be put in one's mouth, selling a product that's expired years ago is dangerously irresponsible. I used it a couple times before noticing the expiration date, I hope it doesn't have any adverse effects in my health. At the very least, it is likely not to be too effective given how quickly the active ingredients react.