This book is about how your body works, and about the chemical reaction involved inside your body. Understanding the biology and the chemistry of your body may help you to understand how cancers grow and spread, and how treatments might affect you. In this book, biology will deal with the activities and characteristics of all organisms in human which fall into two major categories: reproduction metabolism. The mechanism of reproduction is now known to be controlled by the properties of certain large molecules called nucleic acids that transcribed the entire DNA helix at once into mRNA and also the cross selection between alleles(alleles control the same inherited characteristics) in both parents. The other major activity of the human's living organisms is metabolism, the physical, chemical, and physiological processes by which energy and synthesis of proteins, hormones, and enzymes are used in such activities as reproduction (including growth), activities, and responsiveness to the environment, which also constitutes the activities of the nervous system. The nitrogen bases form the double-strand of DNA through weak hydrogen bond; have different shapes constituting adenosine, guanine thymine, and cytosine. Now that we've looked at the introduction, we should look at the structure of the chemical level that includes all chemical levels that includes alchemical substances necessary for life, Chapter 1. Chapter 2 deals with the physiology that deals with the internal working of living things, including functions such as metabolism, respiration, energy, and internal processes. Chapter 3 is the main core of the book that will discuss causes of cancers focusing on cellular oxidation and reduction due to excess donation or absorption of hydrogen. Avoidance of those elements such as Aluminum(Al), Silicon(Si), Phosphorus(P), Sulfur(S), Fluorine(F) and Chlorine(Cl) could reduce the risk of cancer due to the non-oxidative breakdown of certain substances.