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Review says inexpensive food a key factor in rising obesity
Date:5/22/2014

ATLANTA May 22, 2014A new review summarizes what is known about economic factors tied to the obesity epidemic in the United States and concludes many common beliefs are wrong. The review, authored by Roland Sturm, PhD of RAND Corporation and Ruopeng An, PhD, of the University of Illinois at Urbana-Champaign, notes that paradoxically, rising obesity rates coincided with increases in leisure time, increased fruit and vegetable availability, and increased exercise uptake. The review appears early online in CA: A Cancer Journal for Clinicians and finds at least one factor fueling the obesity epidemic: Americans now have the cheapest food available in history.

Today, two in three Americans are overweight or obese, with rates climbing steadily over the past several decades. Many factors have been suggested as causes: snack food, automobiles, television, fast food, computer use, vending machines, suburban housing developments, and portion size. The authors say forming a coherent picture is a challenge, but is necessary to assess whether the many proposed solutions, from encouraging physical activity and decreasing access to high calorie foods, to building more exercise-friendly environments, increased labeling, or even levying taxes on some foods, can make a difference.

After examining available evidence, the authors say widespread availability of inexpensive food appears to have the strongest link to obesity. They write: "Americans are spending a smaller share of their income (or corresponding amount of effort) on food than any other society in history or anywhere else in the world, yet get more for it." In the 1930s, Americans spent one-quarter of their disposable income on food. By the 1950s, that figure had dropped to one-fifth. The most recent data show the share of disposable income spent on food is now under one-tenth.

The authors review the evidence for other factors, and say the rise of electronic entertainment, increased us
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Contact: David Sampson
david.sampson@cancer.org
American Cancer Society
Source:Eurekalert

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