For those who are in the medical science area fighting diseases and intoxications on a daily basis, this book intends to bring some of the latest results written to a medical context. For students of chemistry and medical sciences, this book will help shed some light on, for instance, the role of metal ions in the environment of life and how sinister the consequences are of contaminations in the environment, mainly water and soils. Results in the scientific literature in Medical Sciences are seldom read by medical doctors. However, many results in Bioinorganic Chemistry and Biochemistry are straight linked to free radicals production and to some diseases, such as degenerative ones (Alzheimer, Parkinson, Wilson, etc.). Metal ions are now shown in the chemistry literature to play a vital role in these diseases. Therefore, external chemical effects, as well as biochemical (internal) effects have to be considered.