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In reply to the discussion: Modern wheat a "perfect, chronic poison," doctor says [View all]HiPointDem
(20,729 posts)do less physical activity.
This is borne out by yearly estimates of caloric intake from various agencies, conducted since about the 1940s:
The CDC reported that in 2000, women ate 1,877 calories per day, 335 calories more per day than they did in 1971. Men, averaging 2,618 calories per day, consumed 168 calories more per day than their counterparts in 1971 ("Trends in Intake of Energy and Macro-nutrientsUnited States, 19712000," Morbidity and Mortality Weekly Report, vol. 53, no. 4, February 6, 2004).
According to the U.S. Department of Agriculture (USDA) in the Agriculture Fact Book 20012002, during the 1950s food production in the United States provided about 800 fewer calories per person per day than in 2000. Of the 3,800 calories produced per person per day in 2000, the USDA estimates that about 1,100 calories were wasted, either through spoilage, plate waste, or cooking, leaving an average of about 2,700 calories per person per day. The USDA data reveal that average daily calorie intake increased nearly one-quarter (24.5%) or about 530 calories between 1970 and 2000.
Read more: Americans Weigh in Over Time - Why Are So Many Americans Overweight? - Food, Table, Consumption, and Portion http://www.libraryindex.com/pages/2709/Americans-Weigh-in-Over-Time-WHY-ARE-SO-MANY-AMERICANS-OVERWEIGHT.html#ixzz28sSnrcU3