Mental health has become the beating heart of Diary of a CEO. What started as a business podcast has evolved into one of the most important platforms for honest, stigma-free mental health conversations in the world. Steven Bartlett doesn't just interview experts — he shares his own struggles with loneliness, imposter syndrome, and the psychological cost of success.
We've listened to every episode and ranked the best Diary of a CEO episodes for mental health based on expert credibility, actionable advice, emotional depth, and listener impact. Whether you're dealing with anxiety, depression, trauma, or simply want to understand your own mind better, this guide will point you to the right 1.5 hours.
Dr. Julie Smith is a clinical psychologist who became one of TikTok's most-followed mental health professionals — and her Diary of a CEO conversation is the single best starting point for anyone struggling. She breaks down clinical concepts into tools you can use today.
"When you feel anxious, your brain is not broken. It's doing exactly what it was designed to do — it's trying to protect you. The problem is that it's responding to a modern world with an ancient operating system."
— Dr. Julie Smith, Clinical Psychologist
Dr. Smith explains the "emotional elevator" concept — that our emotions move between floors throughout the day, and the goal isn't to stay on the top floor permanently, but to recognise which floor you're on and have tools to move when you're stuck.
"Depression lies to you. It tells you that nothing will help, that you should stay in bed, that reaching out is pointless. And the cruellest part is that it's very convincing."
— Dr. Julie Smith, Clinical Psychologist
Key takeaways:
Dr. Gabor Maté is one of the world's leading experts on trauma and addiction. His Diary of a CEO episode is widely considered one of the most life-changing 1.5 hours in the show's history. Maté reframes everything you think you know about why people suffer.
"Trauma is not what happens to you. Trauma is what happens inside you as a result of what happens to you. It's not the blow on the head — it's the concussion."
— Dr. Gabor Maté, Physician & Trauma Expert
Maté argues that most addiction, anxiety, and depression can be traced back to childhood experiences — not necessarily abuse, but emotional disconnection. A child who learns to suppress their emotions to maintain attachment with their parents carries that suppression into adulthood.
"The question is not why the addiction, but why the pain. Not why the anxiety, but why the disconnection. We've been asking the wrong questions for decades."
— Dr. Gabor Maté, Physician & Trauma Expert
Key takeaways:
Dr. Paul Conti is a Stanford-trained psychiatrist who brings deep clinical expertise to the conversation about trauma and the unconscious mind. His DOAC episode goes beyond awareness into the actual mechanics of how trauma is stored and processed.
"Unprocessed trauma doesn't stay in the past. It lives in your nervous system, it shapes your relationships, it influences every decision you make — and you don't even know it's happening."
— Dr. Paul Conti, Psychiatrist
Conti explains how trauma creates what he calls "unconscious defence structures" — patterns of behaviour we develop to protect ourselves that eventually become the very things holding us back. The overachiever driven by a need to prove their worth. The people-pleaser who can't say no. The avoidant partner who runs from intimacy.
"Most people don't come to therapy saying 'I have trauma.' They come saying 'I don't know why I keep doing this.' That's where the work begins."
— Dr. Paul Conti, Psychiatrist
Key takeaways:
Professor Matthew Walker, neuroscientist and author of Why We Sleep, makes a devastating case that sleep deprivation is the hidden driver behind anxiety, depression, and emotional instability. His Diary of a CEO episode reframes sleep as a mental health intervention.
"There is no major psychiatric condition in which sleep is normal. Sleep disruption is not a symptom of mental illness — it is a causal factor."
— Matthew Walker, Professor of Neuroscience, UC Berkeley
Walker reveals that just one night of poor sleep increases activity in the amygdala (your brain's fear centre) by 60%, while simultaneously disconnecting it from the prefrontal cortex — the part of the brain responsible for rational thought and emotional regulation.
"We are the only species that deliberately deprives itself of sleep for no apparent reason. And we are paying for it with an epidemic of mental illness."
— Matthew Walker, Professor of Neuroscience, UC Berkeley
Key takeaways:
The best insights from every episode — summarised and delivered to your inbox.
Subscribe Free →Jay Shetty — former monk, bestselling author, and purpose coach — delivers one of the most emotionally resonant DOAC episodes. His conversation with Steven Bartlett goes deep into the crisis of meaning that drives so much modern anxiety and depression.
"We spend so much time trying to be liked by everyone that we forget to ask ourselves if we even like who we've become."
— Jay Shetty, Author & Purpose Coach
Shetty explains the difference between solitude and loneliness — how being alone with purpose is nourishing, while being surrounded by people you can't be authentic with is the most isolating experience of all. He speaks directly to the epidemic of high-achieving, externally successful people who feel empty inside.
"Your identity is not your job title, your bank balance, or your follower count. Those are things you do and things you have — they're not who you are."
— Jay Shetty, Author & Purpose Coach
Key takeaways:
Derren Brown — illusionist, author, and Stoic philosopher — challenges the entire self-help industry in one of the most intellectually stimulating DOAC episodes ever recorded. His argument: the relentless pursuit of happiness is making us miserable.
"The self-help industry tells you that you can have anything if you just believe hard enough. That's not empowering — it's a recipe for self-blame when life doesn't go your way."
— Derren Brown, Author & Performer
Brown draws on ancient Stoic philosophy to argue that real contentment comes not from controlling outcomes, but from controlling your response to them. He dismantles the modern obsession with positive thinking and manifestation, calling them "a cruel hoax played on vulnerable people."
"Happiness is not a destination you arrive at. It's the by-product of living well — and living well means accepting that much of life is outside your control."
— Derren Brown, Author & Performer
Key takeaways:
Dr. Andrew Huberman, Stanford neuroscientist and host of the Huberman Lab podcast, brings hard science to mental health. His DOAC episode is packed with specific, evidence-based protocols for managing anxiety, stress, and focus.
"You have a built-in anxiety reset button. It's called the physiological sigh — two short inhales through the nose, followed by a long exhale through the mouth. It's the fastest way to calm your nervous system in real time."
— Andrew Huberman, Professor of Neurobiology, Stanford
Huberman explains that most people are walking around in a state of chronic low-grade stress because they never activate their parasympathetic nervous system. He provides specific protocols — morning sunlight exposure, cold water immersion, non-sleep deep rest (NSDR) — that directly modulate neurotransmitters involved in mood and anxiety.
"Your brain doesn't distinguish between real danger and imagined danger. That's why you can feel genuine fear watching a horror film. Understanding this is the first step to mastering anxiety."
— Andrew Huberman, Professor of Neurobiology, Stanford
Key takeaways:
Marisa Peer, celebrity therapist and founder of Rapid Transformational Therapy, delivers perhaps the simplest yet most powerful mental health message in DOAC history: "I am enough." Her episode has been watched millions of times and has become one of the show's most-shared.
"Every problem you will ever have — overeating, overdrinking, overspending, staying in toxic relationships — comes down to one root belief: 'I am not enough.'"
— Marisa Peer, Therapist & Author
Peer explains that the belief of "not being enough" is installed in childhood — through criticism, comparison, or conditional love — and runs silently in the background like malware, shaping every decision we make as adults.
"Your mind does what it thinks you want. If you tell it 'I'm not good enough' often enough, it will arrange your entire life to prove you right."
— Marisa Peer, Therapist & Author
Key takeaways:
Mo Gawdat, former Chief Business Officer at Google X, lost his 21-year-old son Ali during a routine surgery. The tragedy led him to apply his engineering mind to understanding happiness — and his DOAC episode is one of the most emotional in the show's history.
"Happiness is greater than or equal to the events of your life minus your expectations of how life should be. It's an equation. And once you understand it, everything changes."
— Mo Gawdat, Former Chief Business Officer, Google X
Gawdat's happiness equation is deceptively simple: unhappiness occurs when reality falls short of expectations. The solution isn't to lower expectations, but to align them with reality and find meaning even in suffering.
"My son died and I still found a way to be happy. Not because I forgot him — but because I chose to honour his memory by living fully rather than dying slowly."
— Mo Gawdat, Former Chief Business Officer, Google X
Key takeaways:
Bren— Brown — research professor, bestselling author, and the woman whose TED talk on vulnerability has been viewed over 60 million times — brings her research on shame, courage, and human connection to DOAC.
"Vulnerability is not weakness. It's our most accurate measure of courage. You cannot get to courage without walking through vulnerability."
— Bren— Brown, Research Professor, University of Houston
Brown explains that shame thrives in secrecy, silence, and judgement. The antidote is empathy — sharing your story with someone who has earned the right to hear it. She draws a critical distinction between guilt ("I did something bad") and shame ("I am bad"), explaining that guilt can be productive while shame is always destructive.
"If you put shame in a petri dish, it needs three things to grow exponentially: secrecy, silence, and judgement. If you put the same amount of shame in a petri dish and douse it with empathy, it can't survive."
— Bren— Brown, Research Professor, University of Houston
Key takeaways:
Dr. Anna Lembke, Chief of the Stanford Addiction Medicine Dual Diagnosis Clinic and author of Dopamine Nation, explains why modern life has turned us all into dopamine addicts — and what to do about it.
"We're living in a world of unprecedented access to high-dopamine substances and behaviours — from drugs to social media to food to pornography. And our brains haven't evolved to handle it."
— Dr. Anna Lembke, Professor of Psychiatry, Stanford
Lembke explains the pleasure-pain balance: every time you experience pleasure, your brain tips the balance toward pain to restore equilibrium. With repeated high-dopamine hits (scrolling, sugar, alcohol), the balance gets stuck on the pain side — creating a state of chronic low-grade misery that we mistake for depression.
"The smartphone is the modern-day hypodermic needle, delivering digital dopamine 24/7 for a wired generation."
— Dr. Anna Lembke, Professor of Psychiatry, Stanford
Key takeaways:
Chris Williamson, host of Modern Wisdom, brings nuance to one of the most divisive topics in mental health: the male mental health crisis. His conversation with Steven Bartlett tackles loneliness, purpose, and why men are struggling more than ever.
"Men are told to open up, but when they do, they're often punished for it. That creates a double bind that makes male mental health incredibly difficult to navigate."
— Chris Williamson, Podcast Host & Author
Key takeaways:
Fearne Cotton, TV presenter and founder of the Happy Place brand, shares her deeply personal battle with anxiety, burnout, and the pressure of performing happiness while falling apart inside.
"I had everything society told me would make me happy — the career, the family, the house — and I was the most anxious I'd ever been. That's when I realised I'd been chasing the wrong things."
— Fearne Cotton, Broadcaster & Author
Key takeaways:
Simon Sinek, bestselling author of Start With Why and Leaders Eat Last, reframes loneliness as the defining mental health crisis of the modern age — and connects it directly to how we work, lead, and build relationships.
"We live in the most technologically connected age in human history, and we have never been lonelier. Connection is not the same as communication."
— Simon Sinek, Author & Leadership Expert
Sinek explains that human beings are social animals who evolved to survive in tribes. When we feel unsafe or disconnected at work, our cortisol levels rise — producing the same stress response our ancestors felt when separated from the group.
"The reason we struggle with loneliness is not that we lack people around us. It's that we lack people around us who make us feel safe enough to be ourselves."
— Simon Sinek, Author & Leadership Expert
Key takeaways:
Some of the most powerful mental health moments in DOAC aren't from the guests — they're from Steven Bartlett himself. Across multiple episodes, Bartlett has been remarkably transparent about his own struggles.
"I built a company worth hundreds of millions and I'd never felt more alone. Success doesn't cure loneliness — it can actually make it worse because fewer people can relate to your problems."
— Steven Bartlett, Founder & Host, Diary of a CEO
Bartlett has spoken openly about growing up in poverty, being the child of a broken home, feeling like an outsider, and the imposter syndrome that follows him despite his extraordinary achievements. His willingness to be vulnerable has given millions of listeners permission to do the same.
"I used to think vulnerability was weakness. Now I think it's the single bravest thing you can do. Telling your truth when the world rewards pretending — that takes more courage than any business decision I've ever made."
— Steven Bartlett, Founder & Host, Diary of a CEO
Key takeaways:
We summarise every new DOAC episode so you can learn in minutes, not hours.
Join the Newsletter →Most mental health content online falls into two categories: oversimplified Instagram quotes or dense clinical papers. DOAC occupies a unique middle ground — long-form, 1.5 hours conversations with world-class experts, guided by a host who's genuinely curious and willing to share his own vulnerabilities.
Steven Bartlett doesn't pretend to have all the answers. He asks the questions that his audience — largely 18-35-year-olds navigating careers, relationships, and identity — actually wants to ask. The result is mental health education that feels like a conversation with a wise friend, not a lecture.
That said, these episodes are not a substitute for professional help. If you're struggling, please reach out to a therapist, your GP, or a crisis line. The experts on DOAC would all say the same thing.
The top-rated DOAC mental health episodes feature Dr. Julie Smith (anxiety and depression), Dr. Gabor Maté (trauma and addiction), Dr. Paul Conti (processing trauma), Matthew Walker (sleep and mental health), and Jay Shetty (purpose and self-worth). See our full ranked list above.
Start with Dr. Julie Smith's episode for practical tools, then watch Andrew Huberman's for the neuroscience of anxiety and specific breathing protocols. Dr. Gabor Maté's episode is best if you suspect your anxiety has roots in childhood experiences.
Yes, extensively. Bartlett has spoken openly about loneliness, imposter syndrome, growing up in poverty, and the psychological cost of entrepreneurial success. His vulnerability is one of the reasons the podcast resonates so deeply with listeners.
No. These episodes are educational and can complement professional treatment, but they are not a substitute for therapy. If you're in crisis, please contact a mental health professional or crisis line immediately.