Theory
Theory
By Topic
Goal Setting
Purpose
Positive Psychology
Sleep
Focus
Habits
Leadership
Energy
Nutrition
Productivity
See All
By Featured Author
Phil Stutz
Ryan Holiday
William McRaven
Peter Drucker
Marcus Aurelius
David Goggins
Sonja Lyubomirsky
Cal Newport
Gabriele Oettingen
Steven Pressfield
See All
By Format
Philosopher’s Notes
101 Classes
+1s
Quotes
All Topics
All Authors
Products
Products
Premium
Coach
Instructor Training
Workshops
Events
The Book
About Heroic
About Heroic
Meet Brian Johnson
Testimonials
Login
Try For Free
The fatter you are, the smaller your brain.
David Perlmutter, MD
Become a Heroic Member
The fatter you are, the smaller your brain. | Heroic
