It's time to turn back the clock In 20 YEARS YOUNGER, Bob Greene offers readers a practical, science-based plan for looking and feeling their best as they age. The cutting-edge program is built around four essential pillars: exercise, nutrition, skincare, and sleep. The book details easy and effective steps we can all take to rebuild the foundation of youth, enjoy better health, improve energy, control stress, and have a more positive outlook. Woven through the text is advice on customizing an exercise plan, creating the best sleep environment, staying mentally sharp, navigating medical...