Genetic and environmental factors in breakfast eating patterns

Area of Science:

• Behavioral Genetics
• Adolescent Nutrition
• Twin Studies

Background:

• Breakfast eating patterns are prevalent but understudied regarding their determinants.
• Understanding the interplay of genetic and environmental factors is crucial for public health initiatives.

Purpose of the Study:

• To investigate the extent to which genetic and environmental factors influence breakfast eating frequency in adolescents.
• To examine sex differences in the heritability and environmental influences on breakfast habits.

Main Methods:

• Utilized twin and twin-family models with a large population sample of 16-year-old twins and their parents.
• Applied common effects sex-limitation models and phenotypic assortment models to analyze variance.
• Assessed additive genetic effects, common environmental effects, and cultural transmission.

Main Results:

• Additive genetic effects explained a substantial portion of variance in breakfast eating frequency, particularly in boys (66%) compared to girls (41%).
• Common environmental effects were more influential in girls (45%) than in boys (14%).
• Phenotypic assortment models best fit the data, with heritability estimates of 72% in girls and 63% in boys, and substantial common family environment influence.

Conclusions:

• The relative influence of genetic and family factors on adolescent breakfast eating frequency is sex-specific.
• These influences are also generation-specific, highlighting the complex interplay of nature and nurture.
• Findings provide insights for targeted interventions to promote healthy breakfast habits.