Instruct: Classify Amazon reviews into positive or negative sentiment
Query: They reek - like formaldehyde

I took these for about a week, but couldn't get past the smell as soon as you open the bottle (I even got rid of the packet inside that absorbs moisture but the smell stayed as strong as ever).I wanted to gag every time I took them. I ordered three bottles, and all smell the same. I'm returning them and cancelling the subscription.