Nanosensors to manipulate food safety and excellent had been evolved lately or are still underneath development. Among others, nanoparticle-based totally sensors, array-based sensors, nanocantilevers, nano-test-strips, nanoparticles in solution, electronic noses, and digital tongues should function nanosensors to detect food-borne pathogens, spoilage microorganisms, toxins, allergens, contaminants, and chemical compounds in foods. The gain of a nanosensor is the opportunity to develop a portable device and to measure in real time with high sensitivity. It was argued that even one unmarried microorganism in a food product can be recorded. Portable gadgets have been advanced in two initiatives funded by the European Union. The tool advanced inside the BioFinger project uses nanocantilevers to detect meals-borne pathogens, toxin, and other undesired compounds in raw materials and food products, whereas an array-based sensor become advanced inside the GoodFood project. Further examples for nanosenors to detect food-borne pathogens use antibody-conjugated fluorescent nanoparticles or biofunctional magnetic nanoparticles. In addition, methods were reported to govern meals first-class the use of an electronic nose. The electronic nose changed into proven to be capable of tracking changes within the volatile additives of fruits.