Study links ultra-processed foods to muscle fat accumulation and impaired function

A new study published in the journal Radiology highlights a connection between the consumption of ultra-processed foods and muscle fat accumulation in the thighs. Researchers analyzed data from 615 adults with an average age of 59.5 years, monitoring them through the U.S. National Institute of Arthritis and Musculoskeletal and Skin Diseases due to risks of knee osteoarthritis. The study found that individuals who consumed more ultra-processed foods exhibited higher levels of intramuscular fat, independent of their body mass index, caloric intake, or physical activity levels. Participants had an average body mass index of 27 kg/m², falling into the overweight category, and ultra-processed foods accounted for 41% of their daily caloric intake. Increased intramuscular fat is associated with reduced muscle function and a higher risk of musculoskeletal issues, particularly knee osteoarthritis. The researchers concluded that dietary quality plays a critical role in muscle health beyond simple weight management. Ultra-processed foods defined in the study include packaged snacks, ready-made meals, sugary beverages, processed meats, and mass-produced baked goods.