Research on the world's five blue zones, where people live longer than normal, reveals high levels of dissolved silica in their drinking water. This book describes that research and explains why dissolved silica is a causal factor of longevity. It discusses how silica water may prevent and heal conditions including Alzheimer's, atherosclerosis, heart disease, autism, multiple sclerosis, osteoporosis, Parkinson's, and seizures. Author Dennis N. Crouse, Ph.D., presents the evidence and practical information about silica water.