Teenage boys with fatty liver disease who cut out added sugars and juice lost about 2 kilograms over 8 weeks, while those who ate normally gained a little weight, showing that reducing sugar can help with weight loss even without trying to eat fewer calories.
Evidence from Studies
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Whether sugar restriction alone, without calorie restriction, consistently leads to weight loss in adolescents with NAFLD across multiple controlled trials.
A systematic review and meta-analysis of all RCTs in adolescents with NAFLD comparing low-sugar diets (matched for calories) to control diets, measuring weight change as a primary outcome, with subgroup analysis by baseline BMI and sugar intake.
Whether a low-sugar diet (calorie-matched) causes greater weight loss than a high-sugar diet in adolescents with NAFLD over 12 weeks.
A double-blind, randomized, controlled feeding study of 80 adolescents with NAFLD, randomized to either a low-sugar diet (<3% calories) or high-sugar diet (15% calories), both matched for total calories, protein, and fat, with weight measured weekly and body composition via DXA at baseline and 12 weeks.
Whether adolescents with NAFLD who naturally reduce sugar intake without calorie restriction lose weight over 1 year and whether this predicts liver fat reduction.
A prospective cohort study of 400 adolescents with NAFLD tracking free sugar intake and weight monthly for 1 year using dietary recalls and biweekly weigh-ins, analyzing whether sugar reduction independently predicts weight loss after adjusting for total energy intake.
Whether adolescents with NAFLD who lose weight without calorie restriction have lower sugar intake than those who maintain weight despite similar calorie intake.
A case-control study comparing 50 adolescents with NAFLD who lost ≥2 kg over 3 months without reducing calories to 50 who maintained weight, matched for baseline BMI and total energy intake, measuring free sugar intake via 3-day dietary records.
Whether free sugar intake correlates with body weight in adolescents with NAFLD after adjusting for total calorie intake.
A cross-sectional analysis of 600 adolescents with NAFLD measuring free sugar intake via 3-day dietary records, total energy intake, and body weight, adjusting for age, sex, ethnicity, and physical activity.