Everything You've Heard About Oxytocin is Wrong
A BrainCraft explainer, with oxytocin researcher Dan Quintana, on where the cuddle hormone idea came from and what the evidence on oxytocin, trust and autism shows.
With BrainCraft presenter (name not stated), Dan Quintana
Key moments
Tap a moment to play the video from there.
- 0:00The cuddle chemical mythThe presenter says common claims that hugging releases oxytocin are not exactly true and notes that oxytocin sprays are sold online.
- 1:04Meet researcher Dan QuintanaQuintana introduces himself as an Oslo researcher and names the most persistent myth: that a brief moment of touch, even hugging a pillow, quickly boosts your oxytocin.
- 1:34Hormone and neurotransmitterQuintana explains that oxytocin works both as a brain messenger and as a hormone released into the bloodstream.
- 2:04From childbirth to social bondingThe presenter describes oxytocin's early link to childbirth and breastfeeding, then 1970s preclinical work suggesting a role in bonding.
- 3:09How a pinch became a hugA 1988 preclinical study linked a pinch to oxytocin release, and the presenter tries to trace how that later turned into hugging advice.
- 4:13Blood levels versus the brainQuintana says oxytocin measured in blood or saliva can be independent of what happens in the brain, so hugging studies are hard to interpret.
- 5:18No feeling from oxytocinQuintana says participants cannot tell oxytocin from placebo, and criticizes selling oxytocin as a mood booster.
- 5:59The trust study and its replicationA 2005 economic game study reported more trusting behavior, but a larger replication did not find the effect, with hints of an effect in low-trust people.
- 7:24In-group bonds, out-group conflictQuintana says oxytocin can strengthen in-group bonds while worsening treatment of outsiders, so it is not simply positive.
- 9:04Mixed results in autism researchQuintana describes a 2016 study with parent-reported improvements and other studies without results, and says his lab is still working out how oxytocin acts.
What the video says
This BrainCraft video takes apart the popular idea that oxytocin is a cuddle or hug hormone. The presenter works with Dan Quintana, a senior researcher in psychology at the University of Oslo, who says he has studied oxytocin for over a decade. Part of the video is sponsored by Wondrium, and the last minute or so is an ad for it.
The first half covers where the idea came from. Quintana explains that oxytocin acts as both a hormone and a neurotransmitter, and that it was first tied to childbirth and breastfeeding. The presenter traces the social side of the story to 1970s preclinical work on mother and offspring bonding, then to a 1988 preclinical study in which a pinch, not a hug, seemed to release oxytocin. How a pinch became a hug in popular accounts is described as hard to pin down. Quintana adds that studies measuring oxytocin in blood or saliva cannot say much about the brain, and that people in his lab's experiments cannot guess beyond chance whether they received oxytocin or placebo.
The second half turns to trust and behavior. A 2005 economic game study reported that oxytocin increased trusting behavior, but Quintana says a much larger recent replication, including some original authors, did not find the same effect. Exploratory analysis in that replication hinted at effects in people with lower general trust. He also says oxytocin can strengthen bonds within a group while worsening treatment of outsiders, and that one study found it increased schadenfreude.
On autism, Quintana describes a 2016 study in which parents reported improved social behavior in children given oxytocin, alongside other studies without such results. He says he would not recommend seeking it out to boost social behavior, because it is not known whether or how it works. The video closes by saying the hug hormone story lasts because it is simple, and that hugging is fine without a hormone rationale.
On each compound
Oxytocin1:34
Quintana says oxytocin acts as both a hormone and a neurotransmitter, and that people in experiments cannot guess beyond chance whether they got it or a placebo. He says its effects on trust and autism-related behavior remain unclear and that it can raise in-group bonding while worsening treatment of outsiders. He would not recommend seeking it out to boost social behavior.
See how your DNA reads Oxytocin“There is no feeling that you get with oxytocin.”
What this video doesn’t settle
- The video does not establish whether oxytocin changes trust or social behavior in people, since its main example is a failed replication with only exploratory hints of an effect.
- It does not settle how much oxytocin hugging or petting actually releases, or whether blood levels reflect what happens in the brain.
- It gives no firm conclusion on oxytocin for autism, only mixed studies and Quintana's statement that it is not known whether or how it works.
Questions this video answers
Does hugging really release oxytocin?
Quintana says the evidence is mixed: oxytocin sometimes rises after a hug and sometimes falls. He adds that blood or saliva measures may only reflect a physical reaction to touch, not changes in the brain, and that any change may not matter.
Does oxytocin increase trust?
A 2005 economic game study reported that it did, according to the video. Quintana says a much larger recent replication did not find the same effect, though exploratory analysis suggested possible effects in people with lower general trust.
Can you feel oxytocin working?
Quintana says no. He reports that participants in his lab and others cannot guess beyond chance whether they received oxytocin or a placebo spray, and he says there is no feeling you get with oxytocin.
Is oxytocin useful for autism, according to this video?
Quintana describes a 2016 study in which parents reported improved social behavior in children, and says other studies found no results. He says outcomes depend on the measures used and on the person, and he would not recommend seeking it out to boost social behavior.
Where did the cuddle hormone idea come from?
The presenter links it to oxytocin's role in childbirth and breastfeeding, then to 1970s preclinical work on mother and offspring bonding. She also points to a 1988 preclinical study involving a pinch and says it is unclear how that became hugging advice.
Video by BrainCraft on YouTube, embedded as published. The summary is written by PeptidesDNA from the video; every claim in it is the speaker’s. Not affiliated with or endorsed by the creator. Not medical advice.
