This book targets various diseases, such as Alzheimer's disease, frontotemporal dementia and various tauopathies. It also provides a profound explanation of various neurodegenerative diseases with novel theories of understanding the etiology, pathological mechanisms, drug screening methodology and new therapeutic interventions. It discusses how hormones and health food supplements influence disease progression of neurodegenerative diseases. This book is appropriate for a various groups of people: college students can utilize it as a textbook; researchers in academic institutions; pharmaceutical companies can use it as an up-to-date account of research information; health care professionals can take it as a reference book, and patients' families, relatives and friends can refer to it as a good means to understand neurodegenerative diseases.