Liquid food could be making you fatter

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We have not evolved to monitor calorie intake from liquids, which is why we easily gorge on smoothies and beverages, says Richard Mattes from Purdue University. Juice cleanses and meal-replacements are popular, but we find out why we aren't so good at keeping liquid calories control. (Image: A close up of carrots being thrown in to liquid fat. Credit: Sakai Yuji/ Getty Images)