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Ultra-processed foods now comprise 2/3 of calories in children and teen diets.
Ultra-processed foods now comprise 2/3 of calories in children and teen diets. The calories that children and adolescents consumed from ultra-processed foods jumped from 61% to 67% of total caloric intake from 1999 to 2018, according to a new study from researchers at the Friedman School of Nutrition Science & Policy at Tufts University. In JAMA, published August 10, 2021, the study analyzed dietary intake from 33,795 children and adolescents nationwide. "Some whole grain breads and dairy foods are ultraprocessed, and they're healthier than other ultraprocessed foods. Processing can keep food fresher longer, allows for food fortification and enrichment, and enhances consumer convenience," said senior and corresponding author Fang Fang Zhang, a nutrition epidemiologist at the Friedman School. "But many ultraprocessed foods are less healthy, with more sugar and salt, and less fiber, than unprocessed and minimally processed foods, and the increase in their consump...
A new study offers insight into how resistance training burns fat.
A new study offers insight into how resistance training burns fat. Findings from a new University of Kentucky College of Medicine and College of Health Sciences study add to growing evidence that resistance exercise has unique benefits for fat loss. The Department of Physiology and Center for Muscle Biology study published in the FASEB Journal found that resistance-like exercise regulates fat cell metabolism at a molecular level. The study results in mice and humans show that in response to mechanical loading, muscle cells release extracellular vesicles that give fat cells instructions to enter fat-burning mode. Extracellular vesicles were initially understood as a way for cells to selectively eliminate proteins, lipids, and RNA. Recently, scientists discovered that they also play a role in intercellular communication. The study adds a new dimension to how skeletal muscle communicates with other tissues using extracellular vesicles, says John McCarthy, Ph.D. study aut...