He has a some things right but other he is quite misinformed. Even in this podcast he again he buys into unsubstantiated notions of yeast overgrowth, leaky gut and leaky brain being responsible for functional GI disorders. He is also misinformed about the regeneration of neurons or neurogensis. He is using old notions. It is now know that neurons are continually produced throughout adulthood - you don't have all the neurons in your brain that you will have throughout you life.