This book has been in my parents' home for YEARS! If I had to guess, at least 40, because the book is much older than me. Anyway, it was a good read, but repetitious, yet there were some great lessons learned throughout the book. My parents are 84 years of age, and they lived by this book. They have their ailments, which did not occur until they were in their late 70s, but they have always had great eating habits, and I truly believe adapting these eating habits has truly worked in their favor.