For the first time, the researchers from the Indian Institute of Technology (IIT) Kharagpur, have reported that the presence of carbon nanostructures (2–3 nm in diameter) in our human blood plasma. The observed particles are identified as N-doped carbon dots having surfaced active O 2 functional groups. Th ese functionalized carbonaceous nanostructures have been originated by catabolic processes of consumed foods and beverages. It may take part indifferent catalytic activities of biomolecules in a cellular system, which is very essential for normal physiological functions. Human blood has comprised of cellular and acellular components with transport gases, hormones, nutrients, enzymes, it balance these immune and physiological systems. There are no any reports pertaining to cells or particles with the size ( ≤ 100 nm) in human blood yet [1–3] . Hence, the researchers make an attempt to examine the presence of particles of the same size. The other reason for looking at such part...