Many experts see sugary drinks as a major contributor to overweight and obesity. Large, well-preformed studies such as Harvard's Nurses' Health Study, which followed more than 50,000 women, have shown a correlation between consumption of sugary drinks and expanding waistlines.
Is this just a correlation, or is there a clear cause-and-effect relationship between the two? Is there something special about sweet beverages that sets them apart from other low-nutritional-value foods, and justifies "blaming" them for a disproportionate contribution to the obesity epidemic?
The science community generally agrees that when it comes to weight control a calorie is a calorie is a calorie, and weight gain is a result of consuming more calories than what one spends no matter where the calories came from. Calories from fats or carbs, junk food or gourmet meals all add up in the same way, and weight gain is just a matter of energy imbalance, in which the extra energy accumulates as fat.
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