Nutrition & Diet

Leucine Supercharges Mitochondria by Shielding Key Energy Proteins

Researchers at the University of Cologne discovered that leucine, an essential amino acid found in meat, dairy, beans, and lentils, directly enhances mitochondrial energy production. The study, published in Nature Cell Biology, shows leucine works by suppressing a protein called SEL1L, which normally breaks down proteins on the outer mitochondrial membrane. By protecting those proteins, leucine allows mitochondria to operate more efficiently and meet higher energy demands. The researchers also found that disrupted leucine metabolism can impair mitochondrial function and fertility in animal models, and that related mutations appear in human lung cancer cells. While findings are promising, experts caution that SEL1L also prevents buildup of damaged proteins, so interventions must be approached carefully.