Here are a few good videos to watch:

Dr. Jason Fung - 'Therapeutic Fasting - Solving the Two-Compartment Problem' - https://www.youtube.com/watch?v=tIuj-oMN-Fk

Dr. Georgia Ede - 'Our Descent into Madness: Modern Diets and the Global Mental Health Crisis' - https://www.youtube.com/watch?v=TXlVfwJ6RQU