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What Loneliness Does To Your Brain, with Ben Rein

2025-10-25 Science & Technology
212.1k
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StarTalk
StarTalk
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The Neurobiology of Loneliness and Social Connection

Discover how social isolation fundamentally stresses the brain and body, leading to tangible health risks, and learn the neurological differences between solitude and feeling truly lonely.

Short Summary

  • Chronically feeling lonely elevates cortisol, triggering a stress response that increases chronic inflammation and damages organs.
  • Social interactions release crucial neurotransmitters (oxytocin, serotonin, dopamine), acting as health-promoting rewards.
  • Personality traits like extroversion correlate with better longevity and lower inflammation, but social health is highly personalized based on trait extroversion.
  • Virtual interactions strip away essential social cues, providing less fulfillment compared to rich, in-person contact.

These insights from neuroscientist Ben Rein detail the physical consequences of loneliness, ranging from elevated stroke risk in laboratory studies to a significant shortening of human lifespans. Understanding the brain's wired need for connection informs practical steps needed to curate your "social diet" effectively.

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Description

What does loneliness do to our brains? Neil deGrasse Tyson, Chuck Nice, and Gary O’Reilly sit down with neuroscientist Ben Rein, author of Why Brains Need Friends: The Science of Social Connection, to explore how the loneliness epidemic impacts our minds, bodies, and even our lifespan. What’s the difference between being alone and being lonely? Why can you be surrounded by people and still feel alone? We breaks down the neurobiology behind social connection, how oxytocin, serotonin, and dopamine reward our interactions, and what happens when we’re missing those signals. From rising cortisol levels to chronic inflammation, we learn how prolonged loneliness can actually damage organs and shorten lives. Do extroverts live longer? How much social time is “enough”? We dig into personality, empathy, and why virtual interactions often leave us unsatisfied. Could our brains be losing their ability to read social cues online—and is that fueling the hostility of the internet age? Can we medicate loneliness away? How do drugs like MDMA affect empathy? We get into why oxytocin is nature’s antidepressant, and how our pets might literally make us healthier. We get into research on what makes for good socializing and how loneliness leads to more loneliness. How do we dig ourselves out? Thanks to our Patrons kendrick bell, edthri, Patrick Canada, Robert Reyes, Rob, Link and Zelda, sweetheat223, Austin Liu, k, Brian Crimmins, Dominic Miller, Thomas Hammer, Tanuj Khandelwal, Adam Bukowski, Gavin Jones-Verity, Powell Houser, Paul Westenheffer, Diego Escamilla Quintana, Mark Johnston, Sam Richie, Kate Bornstein, Terry, Roger Craig, Lawrence Sansevere, Paul Medrano, Maaz Gundagi, Ken Dodge, Bob Wilson, Airshipguy, Adam Omelan, Joseph Jones, Athena Conkins, Peter Keller, Keitumetse Tlokana, The Clacken, Kris Fisher, Jonathan, Tamos Memes, Jesse Krist, Stephanie Thorsen, Scanman, Samuel Steffen, TheEvilSensei, Amporn Rabuenam, Danielle, James Gill, D. Jerome Johnson, Paul Seikel, Quentin, Max Gueli, Sascha, Ed Parker, Kevin Kazaryan, Sean Dowd, Steve Lauson, Jeff Franz, skymaster, Nikolas Holloway, Brando Kaminski, CapApolllo, Mario Hill, WayToOReckless, Sven Felske, Gabriel Garus, Rick Lowes, Raul Luces, Bruce A. Hill, Donkey Kong, Villanarei Cosplay, Rion Hallaran, Travéz Pinto, Doni Black, Terrence Romero, Marie Willumsen, Tristan, Кристиан Михайлов, Gabriel Lee, Diana, Mike Neal, Professor Pixel, jkos21, trolows, Mithun Manivannan, JoshB, Kim DeLaquil, R Schultz, Robin Edser, david halliday, James LEwandowski, John Johnston, DJ BeeAre, writerseye, Tomer Dvir, Murph, Dan Burke, Lord Beerus, VIctor Rivas, Melinda, Enrique, Richard Denson, Nate, Jen Carr, Marc-Antoine Robichaud, José Cabral, Alex Osborn, Devyn Fidel, and David Villasmil for supporting us this week. Timestamps: 00:00 - Introduction: Ben Rein 03:43 - The Paradox of Loneliness 07:10 - Loneliness in the Brain 13:39 - Long Term Loneliness 17:16 - Do Extroverts Live Longer? 26:47 - Virtual v. Real Interactions 30:41 - The Science of Likeability 33:49 - The Science of Empathy 38:56 - Painkillers, Alcohol, & Empathy 44:59 - MDMA 49:12 - Medication for Loneliness 53:52 - Solving the Epidemic Check out our second channel, @StarTalkPlus Get the NEW StarTalk book, 'To Infinity and Beyond: A Journey of Cosmic Discovery' on Amazon: https://amzn.to/3PL0NFn Support us on Patreon: https://www.patreon.com/startalkradio FOLLOW or SUBSCRIBE to StarTalk: Twitter: http://twitter.com/startalkradio Facebook: https://www.facebook.com/StarTalk Instagram: https://www.instagram.com/startalk About StarTalk: Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up! #StarTalk #NeildeGrasseTyson

Top Comments (10)

@dontGetMunsoned 2025-10-25

It seems to be the other way around for me. Weeks of isolation: no stress. Back into society: lots of stress.

1.2k 142 replies
@dr.benrein 2025-10-25

Thanks for having me, gentlemen! It was an honor and a pleasure 🙏

916 56 replies
@jacobdane 2025-10-28

"I used to think the worst thing in life was to end up all alone. It's not. The worst thing in life is to end up with people that make you feel all alone." - Robin Williams

474 10 replies
@HuatulcoGuy 2025-10-25

I guess I'm a freak. I feel the most stress when I am with others. I feel the most joy when I am alone.

431 50 replies
@CybAtSteam 2025-10-25

There's a huge difference between being alone and being lonely. One can be alone without feeling lonely.

326 21 replies
@jabadabadu7089 2025-10-26

I'm 38 years old man, living alone for 9 years now(I have a cat), and honestly I have never felt more calm and in peace. Company just distracts me from being me and the I become agitated and unpleasant. Some of us simply function when we're alone alone.

189 24 replies
@jaydominic 2025-11-27

I thought I was a moderate introvert. But when my wife passed away due to cancer, I realized how lonely the world suddenly became without her. But like they mentioned, my social battery still depletes very quickly and I noticed that my loneliness is starting to have negative effects on my physical condition. This was a truly eye-opening discussion. Thank you so much for these kinds of topics!

76 1 replies
@realAtomicDruid 2025-11-06

I love my peace, but while I hang out with friends I still feel lonely because there's no real depth to conversation outside of surface level stuff. And honestly, trying to connect with people is EXHAUSTING! So I like interactions in small amounts and peace in large amounts.

48 8 replies
@ZeepANation 2025-11-05

13:11 Going from discussing loneliness to an ad for some AI chat bot is crazy whiplash

43 3 replies
@Phantommeeeoowww 2025-12-20

My parents and countless failed relationships have taught me that the only safe place to rest my heart is with myself.

13

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