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If you eat less calories than you burn, you will lose weight. That's just science - that works universally. I don't really think these fad diets are a good way to view health. There's a lot more to a healthy diet than just losing weight - your body needs carbohydrates, in fact carbs should be your primary source of calories and foregoing all carbs isn't a healthy way to lose weight.
Plastic beach is orders of magnitude better