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Taxing sugar-sweetened beverages is likely to decrease consumption, resulting in lower rates of diabetes and heart disease, and these health benefits are expected to be greatest for the low-income, Hispanic and African-American Californians who are at highest risk of diabetes, according to a new analysis led by researchers at UC San Francisco.
Over the course of the next decade, lowered incidence of these diseases would save over half a billion dollars in medical costs, concluded the research team, which includes members from Oregon State University and the Mailman School of Public Health at Columbia University.
The researchers previously modeled the national health effects of a penny-per-ounce tax over the course of 10 years and found that it would reduce consumption among adults by 15 percent, modestly lower the prevalence of diabetes and obesity and prevent tens of thousands of coronary heart events, strokes and premature deaths. The new study considered a range of reductions in sugary beverage consumption among Californians.
In the new study, assuming a decline of 10 to 20 percent in the consumption of soda and other sugary beverages from the tax, researchers concluded that new cases of diabetes and coronary heart disease would drop statewide, and those health benefits would be greatest in poor and minority communities. The analysis, published in the online journal PLOS ONE, predicted that overall, one in 20,000 Californians would avoid diabetes. This estimate would double for Hispanics and poor Californians and triple for African Americans.
"Poor and minority communities in California and nationally have very high rates of diabetes, a chronic condition with potentially devastating health complications," said Kirsten Bibbins-Domingo, MD, PhD, UCSF professor of medicine and director of the UCSF Center for Vulnerable Populations at San Francisco General Hospital and Trauma Center. "Although many steps are needed to reverse the rising diabetes trends in the state, our study suggests that efforts to curb sugary beverage consumption can have a significant positive impact, particularly in those most likely to be affected."
More than 10 million Californians drink at least one sugar-sweetened beverage, such as soda, fruit punch or sports drinks, every day, and surveys show that blacks, Hispanics and the poor consume more of their daily calories from sugar-sweetened beverages than whites and those in higher income brackets. Higher sugar intake is associated with a variety of health risks, including type 2 diabetes, obesity, high blood pressure and coronary heart disease.
Many of the predicted health benefits from cutting consumption of sugary beverages depend on the assumption that people will not replace those calories by eating and drinking more of other things. Given this, researchers examined three different scenarios: that none of the calories would be replaced, that about 40 percent of the calories would be replaced and that all of the calories would be replaced.
Even under the most pessimistic scenario, diabetes and coronary heart disease incidence went down with less sugary beverage consumption, although much less than it would if consumers did not replace all of the calories.
"Drinking sugary beverages increases the risk for obesity and diabetes," said Claire Wang, MD, ScD, co-director of Columbia's Obesity Prevention Initiative. "This hurts our communities and burdens our healthcare system."
San Francisco Supervisors are considering two proposals to tax sugary beverages by two cents per ounce.
Other authors of the paper, "Health Benefits of Reducing Sugar-Sweetened Beverage Intake in High Risk Populations of California: Results from the Cardiovascular Disease (CVD) Policy Model," include Tekeshe A. Mekonnen, MS, Pamela G. Coxson, PhD, and David Guzman, MSPH, all of the UCSF Department of Medicine; James Lightwood, PhD, of the UCSF Department of Clinical Pharmacy; Michelle C. Odden, PhD, of the College of Public Health and Human Sciences at Oregon State University in Corvallis; and Y. Claire Wang, MD, ScD, of the Mailman School of Public Health at Columbia University.
Article adapted by Medical News Today from original press release. Click 'references' tab above for source.
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