New book from NYT bestselling author Lewis Howes is now available!

New book from NYT bestselling author Lewis Howes is now available!


Dr. Will Bulsiewicz

"95% of Serotonin is Made in the Gut!" How The Food You Eat is Tied to Anxiety & Depression

"The food you eat today will change your microbiome by tomorrow. It will change your brain, your ability to function, and your long-term cognitive health."

In this episode of The School of Greatness, Lewis speaks with Dr. Will Bulsiewicz, a renowned gastroenterologist, gut health expert, and best-selling author known for his work in making gut health education accessible. Dr. B explains the critical connection between gut health and mental health, noting that our intestines are home to 38 trillion microorganisms that significantly influence our immunity, mood, and overall well-being. He highlights how adding more plant diversity to our diets can heal our microbiome and emphasizes the importance of facing emotional wounds to achieve lasting health. Dr. Bulsiewicz provides practical advice on enhancing gut health, shares insights into what your poop reveals about your health, and explains how breathing exercises can alleviate constipation. Together, they explore how nutrition, exercise, and emotional healing intertwine to unlock true wellness.

"Exercise shapes our microbiome. Different exercises have different effects, and they can be a game-changer in improving gut health and mood."  

And now let’s jump into episode 1621 of The School of Greatness!

"The diversity of plants in your diet is the number one factor in determining who has the healthiest gut. If we simply added more fiber to our diet, we’d transform the health of this country."  

Some Questions I Ask:

  • What is the connection between the gut and the brain, and how does gut health impact mental health? 
  • What are some mental health symptoms someone might that might signify a gut microbiome issue? 
  • And how can someone start to heal the gut to hopefully start to feel improvement with these mental health symptoms? 
  • What are the top 5 foods to have the healthiest gut possible? That we should be eating every day on a consistent basis to have a healthy gut?
  • Are there supplements we should be incorporating as well if we don’t have access to certain foods? 
  • What would you say is the biggest misconception in the world of gut health right now? 
  • What are 3 things you’d do every day to make sure you have a healthy gut and 3 things you’d never do as a Gastroenterologist?
  • What would you say is the #1 rule for healing gas and bloating? 
  • Is gut health connected to common health issues like heartburn and acid reflux? 
  • Does gut health affect heart health? 
  • Can improving our gut health impact our immune system? And our nervous system? 
  • If we have an unhealthy gut, does that mean we have an unhealthy immune or nervous system? 
  • What about reversing disease? Is it possible to reverse disease by healing the gut microbiome? 

In this episode, you will learn:

  • How your gut health impacts your brain and mental health.
  • The top 5 foods to add to your diet to heal your microbiome.
  • What your poop reveals about your health.
  • How facing emotional wounds and trauma is key to healing your body.
  • The power of breathing exercises in improving gut health.
  • Plus much more…

Show Notes:

Connect with
Dr. Will Bulsiewicz

Transcript of this Episode

Music Credits:


Kaibu by Killercats

Comment below

let us know your thoughts

join thousands of
greatness subscribers
on your favorite platform