Iron nanoparticles from animal blood for cellular imaging and targeted delivery for cancer treatment

► Magnetic nanoparticles were prepared from natural source. ► The prepared composite is purely composed of natural substances. ► The bionanocomposite is biocompatible and biodegradable. ► It finds dual applications, as MRI contrast agent and as targeting delivery agent. ► The preparation of iron nanoparticles from blood is highlighted in “Nature India”.