Mediterranean diet linked to increased mitochondrial microproteins protecting heart and brain

A study published in Nature Communications by Dr. Roberto Vicinanza’s team at the USC Leonard Davis School of Gerontology found that adults who closely follow a Mediterranean diet have significantly higher blood levels of the mitochondrial proteins humanin and SHMOOSE. These tiny proteins are associated with reduced oxidative stress, lower inflammation and improved cellular metabolism, which in turn correlate with better cardiovascular and cognitive health. The research highlighted olive oil, fish and legumes as major dietary contributors to elevated protein levels.

The authors suggest the proteins could become biomarkers for diet‑related health benefits, but note that the observational design does not prove that changing the diet will raise the proteins or directly lower disease risk. Further human trials are needed to confirm the protective role of these microproteins against heart and brain disease.