Clinical Takeaway
A 15-year Canadian cohort study tracked adolescents into early adulthood to examine how body image concerns and disordered eating in youth contribute to later eating disorders, mental health conditions, and substance use problems. The findings reinforce that psychosocial risk factors identified in early adolescence have measurable long-term consequences across multiple health domains. Clinicians should recognize disordered eating and poor body image as early warning signs for broader multimorbid outcomes, not isolated concerns.
#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 eating behaviors and body image concerns progress into adulthood, enabling clinicians to identify high-risk trajectories requiring early intervention. The long-term Canadian cohort data establishes the relationship between early disordered eating and concurrent mental health and substance use disorders in young adults, supporting integrated assessment and treatment approaches in clinical practice. Understanding these multimorbid pathways from adolescence through early adulthood allows clinicians to implement targeted prevention strategies and recognize comorbid conditions that commonly co-occur with eating disorders.
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 provides valuable longitudinal data on how adolescent eating behaviors and body image predict adult mental health outcomes in a Canadian population, the study’s focus on eating disorders and weight trajectories makes it inherently limited for cannabis-specific clinical questions. The abstract provided does not indicate whether cannabis use was systematically assessed as either an exposure variable or outcome measure, which represents a critical gap for clinicians considering cannabinoid interventions in patients with comorbid eating disorders or associated mental health conditions. Substance use is mentioned as a health domain of interest, but without clarity on whether cannabis was distinguished from other substances or examined in relation to eating disorder severity and recovery trajectories. For now, this cohort study reinforces what we already know from general psychiatry literature: that adolescent mental health and body image concerns predict adult multimorbidity, but it does not yet provide the cannabis-specific mechanistic or outcomes data that would guide clinical decision-making around cannabinoid use in eating disorder populations. Clinicians should