Mexico has constitutionally expanded its ban on genetically modified (GM) corn to include all genetic engineering techniques such as CRISPR, intensifying controversy among scientists. The move aims to protect the country’s rich maize biodiversity amid longstanding concerns over transgenic crops. While some experts endorse the ban as a practical safeguard for native landraces, others caution it closes doors to technological advances that could improve crop resilience and yield. The national debate underscores tensions between biodiversity preservation, agricultural innovation, and food security.