**9. Conclusions**

Fruits are a major part of the human diet, supplying essential minerals and vitamins for human health. Acceptability of fruits by consumers depends on quality parameters such as color, texture, absence of decay, and especially the nutritional and health benefit they provide. Edible coatings, driven by their low cost and non-toxic nature, are one of the most well-studied natural polymers and their application has proven promising for fruit preservation. The application of nanoparticles to extend the shelf life of fruits appears most promising in the field of harvest storage. Current materials widely used for coating fruits are zinc oxide, silver, and chitosan nanoparticles because they show good results in preserving post-harvest quality. Another promising area of research is the combination of nanoparticle-enriched edible coatings with the use of current technologies such as low-temperature storage and controlled atmosphere storage. The specifics of the food, the substance to be added, and the intended extension of shelf life all influence the best sub-micron technology to use. As we can see, the ingredients should be non-toxic and be obtained from natural sources, such that the functional nanosystem allows the controlled release of active substances with low solubility. Moreover, the research looked out here, it has become clear that much more work is needed. In particular, we must also understand the behaviour of these materials after consumption, in order to make safe nanosystems that can be used freely in commercial products. Studies on this subject are limited and more information is needed to develop new coating applications with better functionality and higher sensory performance.
