Differences in Nutritional Intake, Total Body Fat, and BMI Score between Twins

Area of Science:

• Genetics and Epigenetics
• Nutritional Science
• Obesity Research

Background:

• Obesity is a complex health issue influenced by both genetic and environmental factors.
• Twin studies are valuable for disentangling the heritability of traits like obesity and nutritional intake.
• Understanding genetic contributions to obesity can inform public health strategies.

Purpose of the Study:

• To investigate the concordance of obesity and nutritional intake between monozygotic (identical) and dizygotic (fraternal) twins.
• To compare differences in dietary habits, total body fat, and body mass index (BMI) between twin types.
• To assess the genetic versus environmental influences on obesity-related traits.

Main Methods:

• Analysis of data from the Korean Genome and Epidemiology Study (KoGES) from 2005-2014.
• Inclusion of 1006 monozygotic and 238 dizygotic twins aged 20 years and older.
• Utilizing linear regression models to compare self-reported nutritional intake, DEXA-measured body fat, and BMI between twin groups.

Main Results:

• No significant differences were observed in overall nutritional intake, DEXA fat, or BMI between monozygotic and dizygotic twins (p > 0.05).
• Monozgotic twins showed significantly lower differences in total calorie and carbohydrate intake compared to dizygotic twins (p < 0.05).
• Total body fat was found to be significantly more concordant in monozygotic twins than in dizygotic twins.

Conclusions:

• Monozgotic twins share more similar dietary patterns concerning total calories and carbohydrate intake.
• Higher concordance in total body fat among monozygotic twins suggests a stronger genetic influence on body fat accumulation.
• While some dietary habits show greater similarity in identical twins, other nutritional factors did not differ significantly between twin types.