Well, what’s done is done. Here are a few recent and hopefully all better media examples by way of making up:
1. If you were alive and cognizant prior to the 1990s, you probably remember that nutrition labels on foods looked different; they didn’t have percent-daily values based on a 2,000-calorie diet. That’s because the Nutrition Labeling and Education Act was signed into law in 1990, requiring manufacturers to be more transparent about their dietary claims -- for example, if a yogurt’s going to be touted as high-protein, consumers would know exactly how much protein is in a serving.
These new labels also made it easier for people to track their daily fat and salt intake. “Because the allowable [saturated fat and sodium] limits would vary according to the number of calories consumed, the FDA needed benchmarks for average calorie consumption,” writes Marion Nestle in Why Calories Count: From Science to Politics.
Enter 2,000.
Why land on 2,000 calories?
Doctors didn’t just pull it out of thin air, did they? Of course not! They used (finger quotes) SCIENCE. Although a male college athlete’s caloric needs vastly differ from those of a postmenopausal woman, for example, there's no way all those different benchmarks would fit on the side of a cereal box. So the FDA decided to go for a middle-ground approach. “The FDA wanted a single number so their recommendations would be simple to follow, and also they did not want to encourage overeating,” Dr. Quebbemann says.
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