I think the book has a lot of great information re how to feed the good gut buddies and starve the bad gut buddies... I loved that information ... unfortunately when Dr Gundry gets into supplements and then the laundry list of whet he himself takes on a regular basis brings me to the conclusion of ...if you jump on the Gundry way, you'll become suppliment poor or a suppliment junky ... that brings me to the conclusion and question " what supplements do the people in the blue zones take?" I appriciate some great insight and will make some adjustments, but I won't be a Gundry groupie... to each their own ...