The increasing complexity of global food systems has intensified concerns regarding food safety, particularly in relation to chemical contaminants and adulterants. Traditional analytical methods, although reliable, often suffer from limitations such as time consumption, high operational costs, and lack of portability. In this context, nanobiosensors have emerged as transformative tools that offer rapid, sensitive, and real-time detection capabilities. This research article presents a comprehensive analysis of nanobiosensor technologies for detecting chemical contaminants and adulterants in food systems, drawing exclusively from established literature. The study synthesizes findings on nanomaterials such as gold nanoparticles, carbon-based nanomaterials, quantum dots, and nanocomposites, examining their functional roles in enhancing biosensor performance. Additionally, it explores fabrication techniques including layer-by-layer assembly, sol-gel synthesis, and green synthesis approaches, highlighting their implications for sensor sensitivity and environmental sustainability. The integration of nanotechnology in food packaging and processing is also examined, emphasizing its role in preventive detection mechanisms. The results indicate that nanobiosensors significantly outperform conventional methods in terms of detection limits, specificity, and response time. However, challenges such as scalability, regulatory constraints, and potential toxicity remain critical barriers to widespread adoption. The discussion provides a nuanced interpretation of these findings, addressing both technological advancements and ethical considerations. The study concludes by outlining future research directions, including the integration of artificial intelligence and smartphone-based detection systems, which could revolutionize food safety monitoring. This work contributes to the growing body of knowledge on nanotechnology applications in food safety and offers a foundation for future innovation in this critical domain.