We have been told to "drink lots of water" whether in health or illness. This precious and essential nutrient of life that forms the basis of the majority of metabolic reactions within this body is being shown by research to emerge as a 'healer' of diseases. This book is one of the first to show the biological aspects of water in a concise manner backed by scientific research. "How much water should we have?"-reading this book can offer insights as to the "dynamic complexity" of the homeostasis of water in the human body to guide what is the recommended intake for regular and pregnant individuals. Research has also been presented as to how water can influence our cognition and mood positively.