This book is written by lame models who preach a vegan diet by scaring you with fake facts and figures. If you take a look at the sources they cite, you will notice that they are mostly pro-vegan websites that have no basis for the information they preach. A definite waste of time and money. If you want to be healthy and live a better life, I suggest purchasing a book where the author has studied dieting and nutrition. Don't trust these models!!!