In the Fenland cohort — a prospective UK study of middle-aged adults born 1950–1975 — higher baseline BMI and DXA-measured body fat percentage were associated with significant increases in both uncontrolled eating (UE) and emotional eating (EE) over a follow-up spanning roughly a decade. The reverse pathway did not hold: baseline eating behaviours were not associated with subsequent changes in adiposity. Effect sizes were modest but consistent across sexes, with emotional eating showing a particularly strong signal in females (γ1 = 0.54, 95% CI 0.34–0.74).
This finding inverts a deeply embedded clinical assumption — that disordered eating patterns cause weight gain — and instead positions elevated adiposity as a likely upstream driver of psychological and behavioural dysregulation around food. The mechanism is plausible: excess adiposity alters appetite-regulating hormones (leptin, ghrelin), affects dopaminergic reward circuitry, and is associated with stigma-induced psychological distress, all of which could amplify emotional and impulsive eating over time.
For clinical practice, this matters considerably. Weight-loss interventions that frame emotional and uncontrolled eating as the root problem may be misdiagnosing cause and effect. Instead, reducing adiposity — through any effective means — may itself attenuate dysregulated eating. The study's observational design limits causal inference, and sensitivity analyses showed attenuation of some UE findings in females. Still, with objectively measured adiposity and bivariate latent change score modelling, this is methodologically stronger than most prior work and represents a meaningful reframing of the adiposity–eating behaviour relationship.