Low birth weight is associated with increased fat intake in school-aged boys.

Lower birth weight was linked to a higher-fat diet in school-aged boys

A developmental influence on eating might change the kinds of food a child eats without increasing the total amount of energy consumed. This study examined whether birth weight was associated with the proportions of fat, carbohydrate and protein in children’s diets.

Measuring diet composition. Guardians of 255 children aged six to twelve completed food questionnaires and supplied information about birth weight, body measurements, family circumstances and parental feeding rules. The sample included 130 boys and 125 girls. Researchers analyzed the sexes separately and accounted for age, income and maternal age.

One outcome was energy density: the energy contained in a given weight of food. A more energy-dense diet can deliver more energy in a smaller amount of food. The researchers also examined which nutrients contributed to any differences, rather than assuming that a denser diet meant a greater appetite overall.

The clearest pattern concerned fat intake in boys. Lower birth weight was associated with a more energy-dense diet in boys, and the nutrient analysis indicated that greater fat intake contributed to that relationship. Birth weight did not predict their protein or carbohydrate intake, and there was no difference in total energy intake. In girls, initial associations between birth weight and fat or cholesterol intake did not remain after statistical adjustment.

The result adds a specific observation to the idea that prenatal development may influence later food preferences. At this age, the association concerned the composition of boys’ diets, rather than a general increase in calories or a pattern shared by both sexes. The authors discuss appetite-regulating and reward-related pathways as possible explanations, but these biological systems were not measured in the study.

Following children over time would help establish whether these dietary differences persist and whether they contribute to later metabolic risk. The present evidence supports a developmental question about food choice; it does not identify an inevitable eating pattern in children born small.