He is a Functional Medicine Neurologist and his talk is on reversing cognitive decline, i.e. neuro-degenerative conditions like Alzheimer's, and Dementia, through lifestyle - particularly around exercise, and food.
This lecture is a brilliant introduction into the world of neuroplasticity - our brains don't stop developing when we reach adulthood.
In fact, the brain is constantly evolving and responding to how active we are, the thoughts we think, and even the food we eat!
As much as 90% of our serotonin (neurotransmitter for happiness) is produced in our gut! GABA, Dopamine, Norepinephrine and many more vital neurotransmitters are also produced in the gut, and transported to the brain.
If our gut health is impaired, it's likely to impact our brain health, and vice versa!