The  main  aim  of  this  book  is to  collect  a  series  of  research  articles  and  reviews  from  a  diverse  group  of scientists to share their research work on the role of free radical research and environmental toxicity. This book presents various state-of-the-art chapters of recent progress in the field of cellular toxicology and clinical  manifestations  of  various  disorders. Topics  include  cell  signaling,  various  risk  factors,  the pathophysiology of disease instigation and distribution, mechanistic insights into metal and nanoparticle toxicity, neural toxicity, nongenotoxic carcinogenicity, immune and idiosyncratic toxicity, prevention, biomarkers related to  disease  progression  and  therapeutic  strategies.  In  particular,  this  book  provides  valuable  insight  for researchers, pathologists, and clinicians with an interest in toxicological research and cellular impairments with special emphasis on therapeutic advancement.