We're back with Episode 417 of The Paleo Solution Podcast. We have one of my favorite guests of all time back on the show, Dr. David Perlmutter. Dr. Perlmutter is a Board-Certified Neurologist and four-time New York Times bestselling author (author of Grain Brain). He serves on the Board of Directors and is a Fellow of the American College of Nutrition. Listen in as we talk about how the science of health and nutrition has progressed and where it's going, ketogenic diets, fasting, alzheimer's, diabetes, medication, and much more.   Show Notes: 00:47 – Pre-intro/Summary 2:12 – Introducing Dr. Perlmutter 3:34 – How has the science behind Grain Brain progressed 8:45 – Health care crisis and important things to focus on 17:50 – How the view of dietary fat has changed in the past 5 years 21:41 – Dr. Perlmutter’s visit with Nestle 25:24 – Why ketogenic diets have become so popular 28:48 – Alzheimer’s ineffective medications 31:08 – Statin drugs increasing diabetes risk 33:58 – Comparing diabetes treatment with medications vs ketogenic diet 34:23 – Diet template and paleo 38:54 – Plants able to change gut bacteria genes 42:15 – Connection 43:28 – Fasting 51:20 – Muscle loss and fasting 57:40 – Things to be aware of and how to thrive on keto 59:49 – Predictions for the next 5 years 1:04:15 – Where you can find Dr. Perlmutter Website: DrPerlmutter.com YouTube: The Empowering Neurologist Book: Grain Brain (Revised and Updated)