This book has lots of good tips on what to chemicals avoid and what supplements to take. It's a scary world out there! Mercury, aluminum, MSG and fluoride to name a few. It makes me wonder how polluted my brain and body already are! i agree with another reviewer that this book is challenging as an audiobook. Because, it lists a lot of details about supplements to take, and other chemicals to avoid. It would help if Audible.com offered a supplemental download like they do with some other books. Otherwise, you need to write down notes as you listen. And, it's hard to know all of the spellings. I'd also recommend the book, 'Doctor Yourself' by Andrew Saul. It's also more upbeat.