Clinical Takeaway
The REAL 2.0 study followed Canadian youth for 15 years to track how adolescent body image issues and disordered eating contribute to eating disorders, weight concerns, mental health conditions, and substance use in early adulthood. This long-term data helps identify which early risk and protective factors most reliably predict adult health outcomes. Clinicians should recognize that adolescent eating and body image concerns are meaningful early signals for a broader pattern of multimorbid conditions that may emerge over time.
#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 study provides critical evidence on how adolescent psychosocial factors including disordered eating and body image disturbance predict adult mental health comorbidities and substance use disorders, enabling clinicians to identify high-risk youth for early intervention. The Canadian cohort data addresses a significant gap in understanding the developmental trajectories linking adolescent eating pathology to multimorbid conditions in adulthood, informing targeted prevention and treatment strategies across pediatric and adult care 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 study provides valuable longitudinal data on how adolescent eating and body image concerns track into adulthood, the relevance to cannabis medicine requires careful interpretation since the abstract does not explicitly detail cannabis use patterns or outcomes in this cohort. Adolescents with disordered eating and poor body image may indeed be at higher risk for substance use including cannabis, potentially as maladaptive coping, though this study’s focus on eating disorders and mental health trajectories does not isolate cannabis-specific findings or dosing patterns that would inform clinical decision-making. The 15-year follow-up design strengthens causal inference compared to cross-sectional work, but without clarity on how cannabis use was measured, controlled for, or analyzed as either confounder or outcome, we cannot draw specific conclusions about cannabinoid efficacy or safety in this population. Clinicians should recognize that adolescents presenting with eating disorders and comorbid mental health symptoms may self-medicate with cannabis, and the
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