Scientists identified a three-gene regulatory network (MabZIP60-MaMYB306-MaWRKY49) that controls the production of resveratrol and flavonoids in mulberry plants. The central regulator MaMYB306 directly activates resveratrol biosynthesis through the MaSTS7 gene while simultaneously suppressing four flavonoid-producing genes (MaCHS, MaF3H, MaDFR, MaANS). This metabolic redirection enhances antioxidant capacity and resistance to Botrytis cinerea fungal infections. This discovery represents a significant breakthrough in understanding plant polyphenol regulation and opens promising avenues for agricultural biotechnology. The ability to fine-tune resveratrol production—a compound linked to cardiovascular health and longevity—while maintaining plant disease resistance could revolutionize functional food development. Unlike previous approaches that often compromise one benefit for another, this regulatory module achieves both enhanced nutrition and crop protection simultaneously. The findings are particularly relevant as resveratrol supplements remain expensive and variable in quality. However, translating these plant-based mechanisms to increase bioavailable resveratrol in human diets requires further research. This work provides a blueprint for engineering other crops to produce higher levels of health-promoting compounds while maintaining agricultural viability.