Postbiotics are defined as metabolites of a probiotic which gives beneficial effects to the host. It is derived both extracellular and intracellular. Exopolysaccharides are one of the most important secondary metabolites which are secreted externally to the cell surface. Exopolysaccharides have positive effect on health such as antitumor effects, antiulcer, antioxidant activities, immune stimulatory activity and also lowers blood cholesterol. Exopolysaccharides derived from lactic acid bacteria.  Zinc nanoparticles have excellent property of anticancer and antibacterial and it is also low in cost and less in toxicity. Zinc oxide nanoparticles synthesized using microbial exopolysaccharides are used as antibacterial food packaging coating to improve the shelf life of the food products. The morphology, elemental analysis or chemical characterization of postbiotics-exopolysaccharides zinc oxide nanoparticles was analyzed by Scanning Electron Microscopy which also gives the Energy-dispersive X-ray spectroscopy.

Index Terms-Postbiotics, Exopolysaccharides, Zinc oxide nanoparticles, Scanning Electron Microscopy (SEM) and Energy-dispersive X-ray (EDX) spectroscopy