With over 23 million children and adolescents in the US overweight or obese, the risks for many chronic diseases continue to increase. An article in the October issue of the Journal of the American Dietetic Association examines the diets of American youth and finds some disturbing results.
"The epidemic of obesity among children and adolescents is now widely regarded as one of the most important public health problems in the US," commented Jill Reedy, PhD, MPH, RD, and Susan M. Krebs-Smith, PhD, MPH, RD, both of the Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, MD. "Most experts agree that the solution will involve changes in both diet and physical activity, in order to affect energy balance. For diet, this means a reduction in energy from current consumption levels…This paper identifies the major sources of overall energy and empty calories, providing context for dietary guidance that could specifically focus on limiting calories from these sources and for changes in the food environment. Product reformulation alone is not sufficient—the flow of empty calories into the food supply must be reduced."
For 2-18 year olds, the top sources of energy were grain desserts, pizza, and soda. Sugar-sweetened beverages (soda and fruit drinks combined) provided almost 10% of total calories consumed. Nearly 40% of total calories consumed by 2-18 year olds were in the form of empty calories from solid fat and from added sugars. Half of empty calories came from six foods: soda, fruit drinks, dairy desserts, grain desserts, pizza, and whole milk.
Researchers examined data from the National Health and Nutrition Examination Survey (NHANES), a nationally representative survey with a complex multistage, stratified probability sample. Trained interviewers conducted in-person 24-hour dietary recalls with all eligible persons, using automated data collection systems that included multiple passes. Calories from solid fats and added sugars were calculated from the USDA MyPyramid Equivalents Database (MPED). Empty calories were defined as the sum of energy from solid fats and added sugars.
Children of different ages get their energy from different sources. For example, the top five sources of energy for 2-3 year olds included whole milk, fruit juice, reduced-fat milk, and pasta and pasta dishes. Pasta and reduced-fat milk were also among the top five sources of energy for 4-8 year olds. Top contributors of energy also varied by race/ethnicity. For example, major contributors for 2- to 18-year-old non-Hispanic blacks included fruit drinks and pasta and pasta dishes, while Mexican Americans' top sources included Mexican mixed dishes and whole milk. Non-Hispanic blacks and whites consumed more energy from sugar-sweetened beverages (combining soda and fruit drinks) than from milk (combining all milks), whereas Mexican Americans consumed more energy from milk than from sugar-sweetened beverages.
In an accompanying commentary, Rae-Ellen W. Kavey, MD, MPH, University of Rochester Medical Center, Department of Pediatrics, Division of Cardiology, Rochester, NY, discusses the role of sugar-sweetened beverages in the development of obesity in childhood.
Dr. Kavey writes, "High added sugar consumption which occurs most commonly in the form of sugar-sweetened beverages is associated with a constellation of cardiovascular risk factors, both independently, and through the development of obesity. Multiple studies have shown that presence of these risk factors in childhood is associated with accelerated atherosclerosis and early cardiovascular disease. Randomized trials of nutritionist-guided interventions show us that diet change can be accomplished and is associated with important cardiovascular benefits. This combined body of evidence suggests that reducing consumption of sugar-sweetened beverages should be considered a critical dietary approach to reducing cardiovascular risk in childhood."
A study of how school vending machines can influence the dietary choices of students is presented in the same issue. Researchers from the CDC and the Florida Department of Health found that the availability of vending machines in middle schools was associated with buying snacks or beverages from vending machines instead of buying school lunches. They also found that although healthier choices were available in school vending machines, the most common choices by students were less healthy snacks and beverages.
"Dietary Sources of Energy, Solid Fats, and Added Sugars Among Children and Adolescents in the United States" by Jill Reedy, PhD, MPH, RD, and Susan M. Krebs-Smith, PhD, MPH, RD.
"How Sweet It Is: Sugar Sweetened Beverage Consumption, Obesity, and Cardiovascular Risk in Childhood" by Rae-Ellen W. Kavey, MD, MPH.
"The Impact of the Availability of School Vending Machines on Eating Behavior During Lunch: The Youth Physical Activity and Nutrition Survey" by Sohyun Park, PhD, MS, William M. Sappenfield, MD, MPH, Youjie Huang, MD, DrPh, Bettylou Sherry, PhD, RD, and Diana M. Bensyl, PhD, MA.
All appear in the Journal of the American Dietetic Association, Volume 110 Issue 10 (October 2010) published by Elsevier
Nancy Burns | EurekAlert!
Drone vs. truck deliveries: Which create less carbon pollution?
31.05.2017 | University of Washington
New study: How does Europe become a leading player for software and IT services?
03.04.2017 | Fraunhofer-Institut für System- und Innovationsforschung (ISI)
An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.
Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...
Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.
Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...
Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.
As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...
Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.
With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...
Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine
Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...
19.06.2017 | Event News
13.06.2017 | Event News
13.06.2017 | Event News
28.06.2017 | Earth Sciences
28.06.2017 | Physics and Astronomy
27.06.2017 | Power and Electrical Engineering