Dietary determinants of hepatic fat content and insulin resistance in overweight/obese children: a cross-sectional analysis of the Prevention of Diabetes in Kids (PREDIKID) study

Pediatric non-alcoholic fatty liver disease (NAFLD) has increased in parallel with childhood obesity. Dietary habits, particularly products rich in sugars, may influence both hepatic fat and insulin resistance (HOMA-IR). The aim of the study was to examine the associations of the consumption of foods (cereals, fruits and vegetables, meat/meat products, dairy products, dairy desserts/substitutes (DDS) fish/shellfish, total and added sugars), sugar-sweetened beverages (SSB) and food components (macronutrients and fiber), on hepatic fat and HOMA-IR. Dietary intake (two non-consecutive 24h-recalls), hepatic fat (magnetic resonance imaging) and HOMA-IR were assessed in 110 children (10.6-1.1 years old) with overweight/obesity. Linear regression analyses were used to examine the associations of dietary intake with hepatic fat and HOMA-IR adjusted for potential confounders (sex, age, energy intake, maternal educational level, total and abdominal adiposity and sugar intake). The results showed that there was a negative association between cereal intake and hepatic fat (-0.197, P<0.05). In contrast, both SSB consumption (=0.217; P=0.028) and sugar in SSB (=0.210, P=0.035), but not DDS or sugar in DDS or other dietary components, were positively associated with hepatic fat regardless of potential confounders including total sugar intake. In conclusion, cereal intake might decrease hepatic fat, whereas SSB consumption and its sugar content may increase the likelihood of having hepatic steatosis. Although these observations need to be confirmed using experimental evidence, these results suggest that healthy lifestyle intervention programs are needed to improve dietary habits as well as to increase the awareness of the detrimental effects of SSB consumption early in life.

This project was supported by the Spanish Ministry of Industry and Competitiveness (DEP2016-78377-R), by ‘Fondos Estructurales de la Unión Europea (FEDER), Una manera de hacer Europa’ and by the University of the Basque Country (GIU14/21). This work was also supported by grants from Spanish Ministry of Economy and Competitiveness (RYC 2010-05957; RYC-2011-09011), by the Education Department of the Government of the Basque Country (PRE_2016_1_0057, PRE_2017_2_0224 and PRE_2018_2_0057), by the Spanish Ministry of Education, Culture and Sports (FPU14/03329), and by the Swedish Society of Medicine.