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Genetics of Food Intake Self-Regulation in Childhood: Literature Review and Research OpportunitiesFaith M.S.a · Carnell S.b · Kral T.V.E.c
aDepartment of Nutrition, Gillings School of Global Public Health, University of North Carolina - Chapel Hill, Chapel Hill, N.C., bDepartment of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, Md., and cDepartment of Biobehavioral Health Sciences, School of Nursing and Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pa., USA Corresponding Author
Myles S. Faith
Department of Nutrition, Gillings School of Global Public Health
University of North Carolina - Chapel Hill, 2204 McGavran-Greenberg Hall, CB 7461
Chapel Hill, NC 27599-7461 (USA)
Pediatric obesity results from a daily energy imbalance between intake and expenditure, an imbalance potentially as slight as ∼30-50 kcal/day (e.g., a few extra sips of cola or bites of a cookie). That an ‘energy gap' so small may be so powerful suggests the importance of understanding mechanisms of food intake self-regulation (FISR). This review focuses on 4 behavioral indices of FISR in childhood: (1) eating in the absence of hunger; (2) eating rate; (3) caloric compensation and satiety responsiveness, and (4) food responsiveness. Evidence from pediatric samples around the world indicates that these traits are associated with body mass index, are heritable, and are linked to polymorphisms in the FTO gene. We review these data, also discussing their relevance to practical issues of parental feeding styles, portion sizes, and health literacy and numeracy. Research gaps and opportunities for future investigation are discussed. Multidisciplinary approaches and study designs that can address gene-environment interactions are needed to advance the science of FISR and stimulate new avenues for childhood obesity prevention.
© 2013 S. Karger AG, Basel