Recent advances in foundational research on energy balance and weight loss shed new light on earlier findings. Emerging evidence and insights around mental illness and client-centred, weight-inclusive approaches have implications for practitioners. This paper provides an overview of opinions from invited experts who presented at the Canadian Nutrition Society Thematic Conference in January 2019. Novelty: Weight loss involves an interplay of multiple factors, not diet alone. There is no "best diet" or treatment approach for weight loss. Future research should involve minimizing weight loss countermeasures and new health system-based approaches aimed at improving health.
Keywords: children; comportement alimentaire; counseling en nutrition; diet restriction; dépense énergétique; eating behaviour; energy expenditure; enfants; maladie mentale; mental illness; nutrition counselling; obesity; obésité; perte de poids; restriction alimentaire; stigmatisation du poids; weight loss; weight stigma.