Skip to content

By playing, you agree to uListen's Terms and Privacy Policy and YouTube's Terms of Service.

Dr Rangan ChatterjeeDr Rangan Chatterjee

How Kindness Can Boost Your Immune System and Make You Happier | Dr David Hamilton

The world is changing and people are feeling scared. What we regard as normal has been completely flipped on its head. What we need now more than ever is kindness.

Dr. David HamiltonguestDr. Rangan Chatterjeehost
Mar 25, 20201h 37mWatch on YouTube

Summaries, chapters, transcripts, and FAQs on this page are made by uListen, not YouTube.

Great conversations run long. Their best ideas don't have to.

uListen is free on iPhone, iPad, Android, Chrome, and Claude.

See how

At a glance

WHAT IT’S REALLY ABOUT

How empathy, kindness, and visualization shape health and performance

  1. Dr. David Hamilton argues that emotions and social connection can produce measurable physiological changes, including immune effects linked to empathy in doctor consultations.
  2. He frames placebo effects as evidence that expectations can trigger the brain to generate real chemicals (such as endogenous opiates) that change symptoms and outcomes.
  3. The conversation highlights research and examples suggesting compassion—whether experienced, given, or even observed—can influence markers like sIgA and oxytocin, with implications for stress and cardiovascular health.
  4. They discuss how unprocessed anger and hostility may relate to health outcomes and how techniques like expressive writing and physical movement can help process emotional stress.
  5. Hamilton presents visualization as a practical tool that can shape neuroplasticity and performance, and he promotes kindness as a habit with “side effects” that include happiness and a ripple effect through social networks.

IDEAS WORTH REMEMBERING

5 ideas

Empathy in a consultation can measurably shift immune response.

He cites a CARE (consultation and relational empathy) study in which patients with cold/flu symptoms secretly rated their doctor’s empathy from 0–10; those who rated a perfect 10 had a 50% higher immune response, which he interprets as the patient’s feelings influencing immune function.

Belief and expectation can trigger real biochemical changes, not “just in the mind.”

He describes placebo effects as the brain producing real, natural substances aligned with expectations (eg, endogenous opiates when someone believes they took a painkiller), and says factors like language and empathy can change how strong the effect is.

Kindness affects not only the giver and receiver, but also observers.

He recounts research where watching compassionate behavior (a Mother Teresa video) increased salivary sIgA by about 50% and stayed elevated for 1–2 hours; he also mentions people moved by an Oprah clip showing increased oxytocin.

Warm connection (via oxytocin) functions as a physiological counterweight to stress.

He frames oxytocin as a “kindness hormone” produced by warmth and connection (kindness, compassion, touch), and argues it has effects that are physiologically opposite to stress hormones, including cardiovascular protection such as blood pressure reduction.

Processing emotions (eg, through expressive writing) is linked to improved health markers.

He cites expressive writing research (15–20 minutes a day for four consecutive days about emotional trauma) as a way to release stored anger/trauma, reporting improved immune response and fewer medical-center visits among participants in some studies.

WORDS WORTH SAVING

5 quotes

Those who scored the doctor a perfect 10 out of 10, their immune response to the same condition was 50% higher than everyone else.

— Dr. David Hamilton

It's not just in your head, it's changing things biologically, physiologically.

— Dr. Rangan Chatterjee

I call it the kindness hormone to make that distinction that it's a physical hormone that gets produced because of how you're feeling in that moment.

— Dr. David Hamilton

If you ever feel small, if you ever feel that you don't contribute, you don't make a difference, you're doing it every single day, even with the little things that you don't think matter.

— Dr. David Hamilton

7-Day Kindness Challenge, something different every day. Push yourself out your comfort zone at least once, and one thing has to be completely anonymous.

— Dr. David Hamilton

Read the available transcript
CARE empathy study and cold/flu recoveryPlacebo effect and endogenous opiatesOxytocin as “kindness hormone” and cardiovascular effectsWatching compassion and sIgA changesTouch, connection, and social bondingAnger/hostility, emotional processing, expressive writingVisualization, neuroplasticity, and performance (tennis example)

Ask ChatGPT about this episode

Get its key ideas, plus a summary of each chapter linked to that point in the video, right in your chat.

  1. Add uListen AI to ChatGPT.

    Install uListen AI in ChatGPT (opens in a new tab)Needs a ChatGPT account.

  2. Paste this prompt into a new chat.

    Use uListen AI to give me this episode's key ideas and a chapter-by-chapter summary, with timestamps: https://www.youtube.com/watch?v=2F2g-6lPftI

SPEAKERS

  • Dr. David Hamilton

    guest

    PhD organic chemist and former pharmaceutical industry scientist who researches and teaches the health effects of kindness and mind-body connections.

  • Dr. Rangan Chatterjee

    host

    Medical doctor and podcast host of "Feel Better, Live More," author of "The Stress Solution."

High quality AI-generated summary created from speaker-labeled transcript.

Get more out of YouTube videos.

Read along on your phone, search it beside the video, or ask your favorite AI app what was said.

iOSAndroidClaudeChatGPTChrome