Clinical Takeaway
The REAL 2.0 cohort study tracked Canadian youth over 15 years to examine how adolescent risk factors like body image concerns and disordered eating contribute to mental health, eating disorders, and substance use outcomes in early adulthood. The study highlights that psychosocial vulnerabilities established in early adolescence can have measurable, lasting effects across multiple health domains into adulthood. Clinicians should recognize adolescence as a critical window for identifying and addressing these interconnected risk factors before they consolidate into chronic, multimorbid conditions.
#6 Research on Eating and Adolescent Lifestyle (REAL) 2.0: 15-year follow-up study of eating disorders and weight-related trajectories, mental health and substance use health from early adolescence to early adulthood-a Canadian cohort profile.
Citation: Obeid Nicole et al.. Research on Eating and Adolescent Lifestyle (REAL) 2.0: 15-year follow-up study of eating disorders and weight-related trajectories, mental health and substance use health from early adolescence to early adulthood-a Canadian cohort profile.. BMJ open. 2026. PMID: 41526025.
Design: 0 Journal: 3 N: 4 Recency: 3 Pop: 3 Human: 1 Risk: -2
This 15-year longitudinal cohort study provides critical evidence on how adolescent psychosocial risk factors, particularly disordered eating and body image concerns, predict eating disorders and comorbid mental health and substance use outcomes in early adulthood within a Canadian population. Understanding these developmental trajectories is essential for identifying high-risk adolescents who require preventive intervention and for informing evidence-based screening and treatment protocols that address the multimorbid nature of eating disorders in clinical practice. The study’s long follow-up period and comprehensive assessment of interconnected health outcomes fill an important gap in Canadian epidemiological data and can guide resource allocation and early intervention strategies in pediatric and adult mental health settings.
Quality Gate Alerts:
- Preclinical only
Methodological Considerations:
- Cross-sectional design — causal inference not possible
Abstract: PURPOSE: Few studies have examined how psychosocial risk and protective factors in adolescence shape mental health outcomes and other multimorbid conditions in adulthood, particularly among Canadian youth. The Research on Eating and Adolescent Lifestyle (REAL) 2.0 study was a 15-year follow-up cohort study designed to investigate how early etiological factors, including body image and disordered eating symptoms in adolescence, contribute to the development of eating, weight-related concerns, mental health and substance use health problems in early adulthood. In this paper, we describe the REAL 2.0 cohort’s demographic and clinical characteristics alongside an overview of the study procedures, laying the groundwork for collaboration on future learnings with this unique data. PARTICIPANTS: The cross-sectional REAL study initially surveyed middle and high school students from 2004 to 2010 (n=3043) across 43 schools in the Ottawa, Canada region. Of those, respondents in grade 7 or 9 (n=1197 from 25 of the 43 original schools) were asked to participate in a longitudinal arm of the study that consisted of yearly follow-ups. From the longitudinal cohort, there were 278 participants (29.1% male; Mage=28.6) from those who consented to be re-contacted (n=912), who completed the REAL 2.0 survey electronically (30.4%), providing comprehensive data on demographic, clinical, eating and weight-related behaviour, psychological, social, environmental and substance use health factors in adulthood. FINDINGS TO DATE: 9.4% of REAL 2.0 participants met DSM-5 criteria for an eating disorder, while 17.6% met criteria for disordered eating. Moderate to severe anxiety was reported by 28% of participants, while 21.6% experienced moderate to severe depressive symptoms. Regarding substance use, 16.9% engaged in hazardous drinking, 16.9% used cannabis daily or almost daily, and 4.3% reported daily tobacco use. FUTURE PLANS: REAL 2.0 has the potential to answer multiple research questions about s
🧠 While the REAL 2.0 cohort study provides valuable longitudinal data on eating disorders and mental health trajectories from adolescence into adulthood, the abstract provided is incomplete and does not appear to contain cannabis-specific findings or data regarding cannabinoid use outcomes. Any clinical implications for cannabis medicine would be speculative without access to the full study results, particularly given that substance use patterns, mental health comorbidities, and disordered eating behaviors are known confounders that could bidirectionally influence cannabis use in adolescents and young adults. If this study does examine cannabis use patterns within its cohort, clinicians should carefully consider whether observed associations reflect cannabis as a causal factor, a symptom management tool for underlying anxiety or disordered eating, or simply a correlate of complex psychosocial distress. The practical takeaway for cannabis-recommending providers is that adolescents and young adults presenting with eating disorders or body image concerns warrant thorough assessment for underlying psychiatric comorbidity before considering cannabis, since these