Dr. Joseph Mercola, one of the world's foremost authorities on alternative health, collaborates with fasting expert Dr. Alan Goldhamer to offer a guide to optimizing health using ketogenic and fasting principles. Fasting is one of the most powerful metabolic interventions there is--one of the single best things you can do for your health. Strategically timed and planned fasts dovetail perfectly with a ketogenic diet, as they activate your body's fat-burning mode. This in turn can ward off insulin resistance, reduce oxidative stress and inflammation, optimize brain function, prevent neurological problems, support weight loss, and more. In this in-depth yet accessible guide, Dr. Joseph Mercola joins forces with fasting expert Dr. Alan Goldhamer to explore the profound health benefits that result when ketogenic living and well-planned fasting are combined. Part I of the book explains why this works, drawing on up-to-the-minute science as well as Drs. Mercola's and Goldhamer's decades of research and clinical experience. Part II shows how to put keto-fasting to work for your own health, with a specific protocol and practical guidelines to follow. Topics include: * How our food is making us sick and what we can do about it * The physiology and mechanisms of fasting, including stem cell activation * How the cyclical ketogenic diet--with fasting included--differs from the conventional keto diet * How fasting can help treat diseases from diabetes to fatty liver to Alzheimer's * And much more.