If eating high-fat food was the cause of obesity, then Americans would be losing weight. The fat content of the American diet has fallen substantially over the past 35 years, reports the USDA's Economic Research Service. Fat accounted for only 32 percent of the calories consumed by the average person in 2011–14, down from 41 percent in 1977–78. The 32 percent figure is within the level of dietary fat recommended by the National Academy of Sciences.
Americans have significantly reduced the fat in their diet, but they haven't lost weight. Just the opposite, in fact. During the past 35 years, as we opted for lower-fat foods, the percentage of people aged 20 to 74 who are overweight expanded from 47 to 71 percent. Obesity climbed from 15 to 40 percent. If fat is not the culprit, then what is behind the obesity epidemic?
Source: USDA, Economic Research Service, Both at Home and Away, Americans Are Choosing More Lower Fat Foods than They Did 35 Years Ago
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