Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Big Fat Lies

This diet is a dangerous piece of pseudoscience. People sometimes lose weight on this diet, but not for the reasons that the author claims. First of all, a high protein diet causes dehydration. Anyone losing more than a pound or two per week is almost certainly losing water weight. Peeing more won't make you thin, period.Second, although the author describes the diet as "luxurious" it is actually very restrictive. The only reason anyone loses weight is because she expends more calories than she takes in. There is nothing special about the diet itself, except that it tends to be rather unappetizing to most people. Consequently, they may eat fewer calories and thereby lose weight.A stated aim of the Atkins Diet is to induce ketosis, a metabolically toxic state. Weight-loss can cause ketosis, not the other way around! Artifically inducing ketosis by diet is not only ineffective, but dangerous.