Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Tuna eaters beware

I did The Atkin's Diet two years ago. I lost 20 pounds in a month. But after a year things started to go terribly wrong. I begain having horrible syptoms of food allergy. But testing showed I had none. I went to doctor after doctor and they all told me I was crazy. I finally had no choice ,but to do research on my own. I discovered a web site about Mercury Poisoning. I had all the classic syptoms and none of the docotrs I saw had any clue. I found a company that did testing by hair samples. I ordered the test and bingo, I'm posative for higher levels of Mercury. And it was from eating so much canned tuna while on the Atkins Diet. I'm not blaming the diet plan itself, but he does recommend eating tuna. I wouldn't go there if I were you.