Ultra-processed food intake linked to increased thigh muscle fat

A study published in the journal Radiology has identified an association between the consumption of ultra-processed foods and increased levels of intramuscular fat in the thigh muscles. The research, which involved 615 participants from the Osteoarthritis Initiative, utilized MRI scans to observe muscle composition in adults at risk for knee osteoarthritis.

Researchers found that as the intake of ultra-processed foods—such as packaged snacks, sugary drinks, and processed meats—increased, so did the presence of fat streaks within the thigh muscles. This intramuscular fat, which differs from subcutaneous fat located under the skin, can replace muscle fibers and may impact the stability of the knee.

The study noted that the link remained significant even after accounting for variables such as calorie intake, physical activity, and socio-demographic factors. While the findings show a strong association, researchers emphasized that the study does not prove a direct causal relationship between ultra-processed food consumption and muscle changes.