HUMAN NUTRITION

Detailed explanation-1: -Almost every packaged food today features calorie counts in its label. Most of these counts are inaccurate because they are based on a system of averages that ignores the complexity of digestion.

Detailed explanation-2: -The calories listed on labels come straight from the manufacturers-and are regulated by the FDA. But the agency allows for a 20 percent margin of error. Because of this, the caloric content is often higher than labeled, yet still within FDA limits.

Detailed explanation-3: -Counting calories can be effective for weight loss in the short term, and it may work long term for some. But for the vast majority of people, it eventually not only fails but also can do harm. For starters, it can detract from the pleasure of eating, turning meals into a tedious exercise of tallying and food weighing.