DNA Methylation can be defined as the method by which methyl groups act on the DNA in order to repress cell processes. DNA methylation is vital for the organic processes taking place inside the human body such as ageing, carcinogenesis and gene expression. The aim of this book is to present researchers that have transformed this discipline and added its advancement. From theories and research to practical applications, case studies related to all contemporary topics of relevance to this field have been included herein. This book will prove useful for students as well as experts in the fields of evolutionary biology, bioengineering, and biochemistry. It is an essential guide for both academicians as well as for those who wish to pursue this discipline further.