A new framework proposes that oxytocin's primary role may be defending positive self-views rather than simply promoting social bonding, explaining its paradoxical links to both affiliation and aggression.
Oxytocin drives both prosocial and antisocial behaviorThe self-protection framework explains this paradox: both cooperation and aggression can serve the same function of defending positive self-views, with context determining which strategy oxytocin promotes
What the researchers found
The review synthesizes evidence across three contexts — intrapersonal, social comparison, and social evaluation — showing that oxytocin consistently modulates processes related to self-protection. Proactive strategies influenced by oxytocin include selective information processing and non-cooperation, while reactive strategies include aggression and cognitive distortion.
The framework uniquely explains why oxytocin produces seemingly contradictory effects: both prosocial behavior (when cooperation protects self-image) and antisocial behavior (when aggression defends against self-threats) can serve the same underlying function of self-defense. The authors also delineate how oxytocin and the structurally similar neuropeptide vasopressin contribute differently to self-protection mechanisms.
Why it matters
The popular narrative of oxytocin as purely a 'bonding' or 'trust' molecule has led to oversimplified therapeutic proposals (e.g., intranasal oxytocin for autism or social anxiety). This more nuanced framework explains why oxytocin interventions sometimes backfire — boosting self-protective aggression or mistrust instead of social warmth. Understanding oxytocin's true function is essential for developing peptide-based therapies that work with, rather than against, its context-dependent nature.
How the study worked
This is a theoretical review and framework paper that synthesizes existing research from multiple disciplines — including social neuroscience, evolutionary psychology, and behavioral endocrinology — to propose a unifying model of oxytocin's role in psychological self-defense. It draws on converging findings from intrapersonal, social comparison, and social evaluation contexts.
What this study cannot tell us
As a theoretical review, this paper does not present new experimental data. The self-protection framework, while integrative, is primarily based on synthesizing existing studies that were not originally designed to test this specific hypothesis. Many of the cited studies used intranasal oxytocin administration, whose brain penetration and dose-response relationships remain debated. The claim that self-protection is 'distinctly human' due to reliance on self-reflection may be difficult to test rigorously. The framework's predictive power — does it generate falsifiable hypotheses better than competing models? — remains to be demonstrated empirically.
How to read the evidence
This is a theoretical review and framework paper, not a primary research study. It synthesizes existing evidence to propose a new interpretive model. While intellectually rigorous, the framework's validity depends on future empirical testing.
When this study was published
Published in 2025, this is a very recent review incorporating the latest evidence and theoretical perspectives on oxytocin function.
The bigger picture
Oxytocin is one of the most studied neuropeptides, with a therapeutic development pipeline spanning autism, social anxiety, PTSD, and addiction. However, clinical trials have yielded inconsistent results, partly because the 'prosocial' framing oversimplifies how the peptide works. This self-protection framework represents a paradigm shift that could redirect both basic research and clinical development. It's particularly relevant as intranasal oxytocin remains widely studied and used off-label, and as researchers explore oxytocin receptor agonists as potential next-generation therapeutics.
Questions still open
- Can the self-protection framework generate specific, testable predictions that distinguish it from other oxytocin models?
- How do individual differences in self-esteem or narcissism moderate oxytocin's self-protective effects?
- Does this framework change how we should design clinical trials of intranasal oxytocin for psychiatric conditions?
Common questions
Why is oxytocin called the 'love hormone' if it can also cause aggression?
How does this change the way we think about using oxytocin as a treatment?
Read the original research
Defending the self: The role of oxytocin in responses to psychological threat.
Neuroscience and biobehavioral reviews, 179, 106406
Citation
Feng, Chunliang; Luo, Wenbo; Zhu, Ruida. (2025). Defending the self: The role of oxytocin in responses to psychological threat.. Neuroscience and biobehavioral reviews, 179, 106406. https://doi.org/10.1016/j.neubiorev.2025.106406