Why Cancer Peer Support Is Poised to Become a Cornerstone of Oncology Care

Cancer remains the leading cause of mortality worldwide, responsible for an estimated 9.7 million deaths in 2022, yet behind those numbers sits an even larger and rapidly expanding population of people living with and beyond the disease. A diagnosis and its treatment can be debilitating, and the psychosocial toll is severe: people affected by cancer face elevated risks of mental health disorders, suicidal ideation, social isolation, and diminished quality of life. At the same time, formal mental health services are chronically stretched, with too few specialists and long waiting times for counselling. Against this backdrop, an international team of researchers from the Multinational Association for Supportive Care in Cancer Psychosocial Working Group has published an editorial in Supportive Care in Cancer arguing that peer support, defined as support exchanged between individuals with shared lived experience of cancer, deserves a fundamental rethink, spanning how it is implemented, researched, funded, and woven into health policy.

The timing of this call is no accident. As survival rates continue to climb, more people are navigating the prolonged psychological and practical challenges of diagnosis, treatment, and survivorship, and that same growing survivor population expands the pool of potential mentors and advocates capable of supporting those who come after them. Peer support operates through emotional, informational, and practical assistance delivered within a relationship grounded in lived experience expertise. People who have stood where a newly diagnosed patient stands can foster trust, empowerment, and hope in ways that professionals without that history cannot. The editorial emphasizes that this experiential understanding promotes a sense of normalcy, reduces isolation, and builds coping strategies, making the support uniquely relevant and impactful.

Demand for peer support is high and the evidence base suggests psychological, social, and behavioral benefits, but the authors are candid about the scientific weaknesses holding the field back. Studies to date are often constrained by small sample sizes, marked heterogeneity in intervention formats, and a lack of long-term follow-up, which together prevent definitive conclusions about efficacy. Meanwhile, the post-pandemic explosion of digitally delivered psychosocial interventions, from virtual groups and online communities to app-based programs, has dramatically widened the potential reach of peer support while raising urgent new questions about quality, safety, and implementation. As cancer care evolves, the researchers argue, so too must the field’s conception of what effective peer support looks like, for whom, and under what conditions.

One of the clearest messages from the Working Group’s collective experience is that peer support is emphatically not a one-size-fits-all model. Its effectiveness hinges on contextual factors including cultural norms, language, health literacy, socioeconomic constraints, cancer type, and the phase of the cancer trajectory, whether diagnosis, survivorship, recurrence, or palliative care. Needs also shift across the lifespan: adolescents and young adults may prioritize identity, fertility, and social concerns such as dating, whereas older adults may focus on independence, managing comorbidities, or caregiver burden. Format matters as well. One-on-one matching by cancer type, treatment experience, age, or cultural background can deepen trust and relevance, while group-based models offer multiple perspectives, group cohesion, and constructive discussion when matching is impractical.

To move the field forward, the authors propose a set of core program components, ideally grounded in theory, that high-quality peer support should share. These include defined competencies outlining the expectations, knowledge, skills, and boundaries of the peer supporter role; foundational and ongoing training in communication, motivational interviewing, health coaching, boundary-setting, confidentiality, ethics, cultural responsiveness, and self-care; access to supervision and organizational support from trained professionals to safeguard both parties; and clear referral pathways, both into peer support programs to ensure equitable access and out of them to professional care when participants need clinical attention. Together, these elements are designed to maximize benefit while minimizing risks of burnout, distress, and inadvertent harm for supporters, recipients, and the clinicians and researchers who facilitate programs.

The editorial also confronts the inherent tension between benefit and burden. Recipients may encounter distress when confronting others’ suffering, or struggle with mismatched needs and difficult group dynamics. Peer supporters themselves may experience significant distress when the person they are supporting relapses, develops complications, or approaches end of life, and without adequate structures they can become overwhelmed, feel responsible for another’s wellbeing, or suffer role ambiguity. A recurring dilemma, which the authors describe as the challenge of professionalising the non-professional, is balancing the authenticity and relational power of lived experience expertise against the professional standards required for safety and equity. Over-professionalisation risks diluting the very qualities that make peer support work; under-structuring it risks harm.

Sustainability and scalability pose their own formidable challenges. Although peer-led interventions are widely assumed to be cost-effective compared with psychologist- or social worker-delivered services, the economic evidence base remains thin, and rigorous evaluations are needed to quantify benefits and justify investment. Tools for fidelity monitoring, role clarity, replicability, and quality assurance will be critical for long-term viability. Equity compounds the problem: peer support remains concentrated in well-resourced settings and has yet to be integrated into formal cancer care frameworks, partly because of mixed effectiveness findings and limited evidence on feasibility, acceptability, and cost-effectiveness. In low- and middle-income countries, additional constraints such as workforce shortages, limited specialist services, lower digital access, and financial pressures may demand task-shifting, community-based delivery, and low-cost or non-digital approaches, ideally embedded within existing primary care or non-governmental infrastructure rather than dependent on short-term external funding.

On the policy and funding side, the authors call for frameworks that address confidentiality, boundaries, and risk management, particularly given that peers routinely share sensitive health information, alongside equity measures that keep culturally appropriate models from being reserved for privileged populations. They argue that funding mechanisms should reward implementation outcomes and equity metrics, incentivizing researchers to measure reach, feasibility, fidelity, and sustainability alongside patient outcomes while embedding access for under-represented groups and cultural safety. Practical implementation steps include competency frameworks and credential pathways such as peer navigation models and the WHO EQUIP tool, co-designing interventions with people with lived experience, especially youth, culturally and linguistically diverse communities, and rural populations, and carefully weighing whether and when peer supporters should be remunerated rather than relied upon as volunteers.

The research agenda the editorial lays out is equally ambitious. The authors urge adoption of hybrid effectiveness-implementation trial designs that test clinical impact and real-world deliverability simultaneously, paired quantitative and qualitative methods to capture barriers and enablers, and adaptive designs capable of flexing with rapidly changing health systems and scaling internationally. Health economics analysis should be embedded throughout. The most glaring evidence gap, they note, is longitudinal: most interventions deliver time-limited support within a single stage of the cancer continuum rather than across its months and years of change, leaving unknown the optimal timing and duration needed to sustain long-term benefit. Beyond experiential reports of positive participation, the field needs data on whether peer support reduces broader health service utilization and improves other outcomes, evidence robust enough to justify financially embedding these programs in cancer care.

Finally, the authors highlight a deceptively simple but consequential problem: language. The field suffers from significant terminological variability, with models labeled as one-to-one, matched, group-moderated, mentor, navigator, lay health worker, digital, online community, or app-based, yet no standardized criteria exist to define or distinguish them. A robust taxonomy, together with reporting standards modeled on the CONSORT checklist for clinical trials, would improve transparency, replicability, and knowledge of under-reported elements such as safeguarding and referral protocols. The editorial envisions a future in which peer support is integrated as a core component of cancer care, blending the power of lived experience with implementation science, global partnerships through organizations like MASCC, standardized measurement, and equity-focused evidence, so that these programs become safe, sustainable, and responsive to the diverse contexts in which people face cancer.

Subject of Research: Implementation, research, and policy considerations for peer support in cancer care

Article Title: Re-defining the future of cancer peer support: implementation, research, and policy considerations

Article References: Schilstra, C. E., Bender, J. L., Taylor, C., Riva, S., Le, P. D., Jongebloed, H., Koczwara, B., Ugalde, A., & Sansom-Daly, U. M. (2026). Re-defining the future of cancer peer support: implementation, research, and policy considerations. Supportive Care in Cancer, 34(11), Article 1105. https://doi.org/10.1007/s00520-026-11346-x

Image Credits: AI Generated

DOI: 10.1007/s00520-026-11346-x

Keywords: peer support, cancer care, psychosocial oncology, cancer survivorship, implementation science, mental health, digital health interventions, health policy, equity, low- and middle-income countries, clinical trials, supportive care