By Mark Ryan, BACP Accredited Psychotherapist and NCPS Accredited Relationship Therapist
I've written elsewhere about what consensual non monogamy covers as an umbrella term and, more recently, about what separates an open relationship from polyamory. Both pieces touch on research comparing relationship structures to each other. This piece asks a different question. It isn't about how polyamorous relationships compare to monogamous or open ones, but about what the research says about the mental health of polyamorous people specifically, and why the answer has less to do with the relationship structure than most people assume.
This distinction matters because the two questions get conflated constantly, in both directions. Someone worried that polyamory itself might be bad for them, and someone defending polyamory as no worse for mental health than monogamy, are often relying on the same handful of studies, but asking subtly different things. This piece is about the second question. It looks at what predicts wellbeing within a polyamorous life, since that turns out to be a more useful and more answerable question than whether the structure is inherently risky.
The Headline Worry, and Why It Misleads on Its Own
Some of the data in this area can look concerning at first glance. In the adolescent study described later in this piece, for example, polyamorous young people began with higher levels of depressive symptoms than their peers. Read in isolation, a finding like that gets used both ways in public conversation, by people sceptical of non monogamy as apparent proof it's psychologically unhealthy, and sometimes by polyamorous people themselves as a source of private worry about whether their relationship structure is somehow responsible.
The research points somewhere else. What it shows, consistently, is that distress goes with stigma. The relationship structure itself has not been shown to cause it. Polyamorous people carry more stigma than most people in conventional relationships ever have to, and that is where the evidence concentrates.
What's Driving the Difference
A large study of 1,176 polyamorous American adults tested this directly, using a minority stress framework, the same model used to understand mental health disparities in other stigmatised groups. Minority stress, meaning discrimination, harassment, and the ongoing work of managing a stigmatised identity, was positively related to psychological distress, including higher self reported depression and anxiety symptoms (Witherspoon and Theodore, 2021). In other words, the distress tracked what being openly polyamorous exposes someone to, which can include judgement from family, friends, colleagues, and sometimes healthcare providers who treat the relationship structure itself as the presenting problem.
The same study looked at what might protect against this, and mindfulness did. Higher mindfulness softened the link between minority stress and psychological distress. The mental health picture here isn't fixed, and that is a very different story from the relationship structure being the problem. In my experience, a settled and positive sense of identity, and a supportive polyamorous or wider non monogamous community, also help people carry the weight of stigma, although I'd describe those as clinical observations and not findings I'm drawing from that study.
One further result cuts against a common assumption. Cognitive flexibility, the general capacity to adapt thinking to new or unexpected information, moved in the opposite direction from what the researchers had predicted. It did not buffer the effect of minority stress in the way mindfulness did. The authors do not settle why, and I'd be cautious about reading too much into it. It is a useful reminder that being good at thinking about a difficult situation is not the same as being protected from it.
Stigma From the Outside Versus Stigma Carried Inside
A separate, important study drew a distinction that matters a great deal in practice, between stigma someone experiences from other people and stigma someone has internalised about themselves. Researchers surveyed 339 people in polyamorous, swinging, and open relationships and found that personal discomfort with being non monogamous, for example wanting to change one's relationship style or seeing it as unnatural, was linked with lower satisfaction with the relationship agreements, lower global relationship satisfaction and lower commitment. Social discomfort and reluctance to be publicly identified as non monogamous were not related to relationship quality (Moors et al., 2021). The outward facing worry, what will people think, mattered far less than the private, internal one, do I secretly think there's something wrong with how I love.
This held in both of the concurrent relationships the participants were asked about, meaning it wasn't specific to one particular partner or one particular dynamic. Someone who privately doubted the legitimacy of their own relationship style reported lower satisfaction and commitment with both partners, not just the one where things happened to be harder. That pattern fits the idea that the belief itself matters, though a survey like this cannot show which comes first.
This has a practical implication. Someone ashamed of being polyamorous, even while functioning well socially and keeping the relationship private without much distress about that specific choice, is in my experience carrying more relational risk than someone who's open about it but occasionally has to field an awkward question from a relative. The privacy itself isn't the problem. The private discomfort is.
This also reframes a question that comes up often, whether to be more open about a polyamorous relationship as a way of protecting mental health. The research suggests that's the wrong lever to pull for most people. Disclosure decisions are personal, shaped by safety, career, family circumstances, and plenty else that has nothing to do with psychological wellbeing. What the data points to instead is examining the private belief, whatever form the relationship takes on the outside, and asking whether some part of you still thinks it's a lesser or less legitimate way to love, since that belief is the piece linked with how the relationship functions.
Polyamorous people report higher rates of depression and anxiety symptoms than the general population in several studies, but that’s not the whole story.
What the Evidence Shows in Young People
A 2024 study looked specifically at adolescents, surveying 323 LGBTQ+ young people aged 12 to 17 at an affirming summer camp, of whom 54, about one in six, identified as polyamorous or ambiamorous, meaning their preferred arrangement varies depending on the situation. At the start of the camp, these young people had higher levels of depressive symptoms than their peers. Over the camp, depressive symptoms and anxiety fell across all the young people, poly and ambiamorous teens included. Many of the polyamorous and ambiamorous adolescents reported not feeling safe to be open about their identity at home, because of stigma, a lack of understanding, and fear of people's reactions (Gillig, 2025). That reflects the adult stigma this piece has already covered, arriving early.
The pattern is the hopeful part. A mental health gap that had been present at the start sat alongside improvement for everyone in an accepting environment. That fits what you would expect if the surrounding environment were doing a good deal of the damage, and it doesn't fit the idea that the relationship orientation is itself the underlying problem.
A careful reading of what this study can and cannot tell us matters here. A summer camp that is explicitly LGBTQ+ affirming is a concentrated environment, more accepting than most adolescents' daily lives, and there was no comparison group outside the camp. The improvement shouldn't be read as proof that a brief exposure to acceptance produces this effect everywhere. It is encouraging, and it fits with what I see in the therapy room, which is that acceptance matters for how people feel.
What This Means in Practice
None of this is unique to polyamory as an orientation. Similar patterns show up wherever a minority identity meets a hostile or simply indifferent environment, and bisexual people specifically report a comparable pattern of having their relationships doubted or dismissed, which is relevant given how often polyamorous and bisexual identities overlap in the same person. The mechanism tends to be the same one, an identity treated as illegitimate by people who matter to you, met with the ordinary human cost of hiding, explaining, or defending something private.
In my experience, many people navigating polyamory specific stigma are simultaneously navigating a second layer of erasure about their sexual orientation, and the two can compound, which is a useful thing to know if you're trying to make sense of why some people's experience of this feels heavier than either identity alone would suggest. Gay and queer men and women who are exploring non monogamy can meet the same stacked doubt, as I describe in gay open relationships.
Practically, this points toward specific, actionable things rather than vague reassurance. Finding or building community with other non monogamous people, where that's available, functions as real protection, not just pleasant company. Working through private discomfort about the relationship structure itself, where it exists, tends to matter more for relationship quality than managing how visible the relationship is to the wider world. And it helps to choose a therapist who won't treat the relationship structure as the thing to be fixed before anything else can be discussed.
Community access also looks uneven outside major cities or specific online spaces, and that reality deserves acknowledging directly. Not everyone has ready access to an existing polyamorous community, and building connection on demand isn't straightforward. Where a wider community isn't accessible, even one or two people who know the full shape of the relationship and don't treat it as something to be managed or minimised can carry some of the same weight. In my experience, what helps is feeling less alone with the identity, not necessarily belonging to a large or formal group.
A related, smaller point comes up often enough in practice to include. Family of origin often carries more weight than any other single relationship in this picture. A supportive community can meaningfully offset the cost of a strained relationship with a sibling or parent, but rarely erases it entirely. Grieving the loss of full acceptance from a specific, important person in your life, even while building a good life elsewhere, is a normal and entirely separate piece of work that doesn't resolve just because other sources of support are present.
How Therapy Can Help
What's often useful for initial conversations is looking at what's contributing to how you're feeling, whether that's a specific stigma related stressor, a private discomfort worth examining openly, or something in the relationship itself that has nothing to do with its structure. If jealousy is part of the picture, jealousy in non monogamous relationships covers it in more depth.
Affirming practice matters more here than in most areas of relationship work, given how much of the distress this research points to comes from providers who treat the structure itself as pathological. A therapist who starts from curiosity about your specific situation, rather than scepticism about the structure you've chosen, tends to get to the real problem considerably faster.
This distinction between structure and function is useful in any relationship work, non monogamous or otherwise. Two questions that sound similar are, in practice, quite different. Is this relationship structured in a way that works for the people in it, and does everyone involved feel settled and secure in that structure? Most of the useful clinical work sits in the second question. The first is rarely where the real difficulty was hiding.
The distinction cuts the other way too, for anyone reading this who's still deciding whether polyamory is right for them. Struggling with some of what this piece describes, such as discomfort with disclosure, occasional private doubt, or the ordinary friction of managing a stigmatised identity, isn't evidence that the structure itself was a mistake. It's evidence of living in a culture that hasn't caught up with the range of ways people build relationships. That's a real cost, and it deserves to be named plainly rather than minimised. It isn't the same thing as the relationship itself being wrong for you.
If you feel like now might be the right time to talk this through with a therapist, I offer a free 30 minute consultation in person (in London) or online. You don't need to have decided how open you want to be about your relationships before that conversation, and it's not a precondition for getting support, or for the work being useful from the first session.
About the Author
Mark Ryan is a BACP Accredited Psychotherapist and NCPS Accredited Relationship Therapist working in person across central London, from rooms in Pimlico, Kensington, and Angel. He works with couples, individuals, and polycules on relationship issues including jealousy, affairs and betrayals, sex problems, and considered separation. His practice is integrative, sex-positive, and affirming of all relationship structures and identities.
References
Gillig, T. K. (2025). Polyamorous and ambiamorous adolescents: A first empirical look at mental health in an LGBTQ+ sample. Psychology & Sexuality, 16(1), 1 to 12. https://doi.org/10.1080/19419899.2024.2340985
Moors, A. C., Schechinger, H. A., Balzarini, R., & Flicker, S. (2021). Internalized consensual non monogamy negativity and relationship quality among people engaged in polyamory, swinging, and open relationships. Archives of Sexual Behavior, 50(4), 1389 to 1400. https://doi.org/10.1007/s10508-020-01885-7
Witherspoon, R. G., & Theodore, P. S. (2021). Exploring minority stress and resilience in a polyamorous sample. Archives of Sexual Behavior, 50(4), 1367 to 1388. https://doi.org/10.1007/s10508-021-01995-w
