Particularly high health risks associated with impacts of metal and metal oxide nanoparticles (Me-NPs), and their presence in the occupational environment, not only in nano-industry, but also in some long-existing technologies as well necessitates to maintain levels of hazardous exposures as low as possible and also to find ways to enhance the body's resistance to them. The article briefly discusses the theoretical background of suсh a «bio-protection». The analysis of the most significant results of experiments with different Me-NPs, shows that against the background of properly selected combinations of certain biologically active agents used in harmless doses, it can be possible to significantly weaken integral and specific toxicity and even genotoxicity of metal-containing nanoparticles.