As many economic sectors are using different nanoparticles more frequently, there is growing interest in the biological and environmental safety associated with their production. While avoiding any related toxicity, green nanotechnology offers tools for converting biological systems to environmentally friendly methods of synthesizing nanomaterials. Green approaches utilize biological sources because the physicochemical creation of these nanoparticles uses a lot of hazardous chemicals and harsh settings. Green nanotechnology can create secure and environmentally friendly metal nanoparticles without using harmful chemicals by combining the principles of green chemistry and engineering. The types of phytochemicals used in the creation of nanoparticles, including proteins, polysaccharides, vitamins, glycosides and essential fatty acids, are thoroughly examined in this chapter.