Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This book has had a significant impact on my health.

In his book Dr. Smith put together essential information in one place at one time that influenced a complete dietary lifestyle change for myself and my husband. The mystery of complicated cellular chemistry is made simple and easy to understand. Further, I now understand what free radicals are and how they attack the body and what to do about them. The steps to good health choices outlined by Dr. Smith are do-able; we have done them and are already reaping the rewards. This book makes you stop, think and act. It is very readable and will be an ongoing reference in our home for years and years to come. This is not a diet book, it is a lifestyle choice that makes ulitmate sense and provides almost immediate positive benefits. The recipes that get you started on the lifestyle changes are great and provide encouragement for further vegan creativity. Thank you, Dr. Smith!