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Cutting Added Sugar Helps Resolve Fatty Liver Disease in Kids

A 48-week trial found children who reduced free sugar were far more likely to resolve fatty liver disease than those who didn't.

By Dr. Josh Axe · November 6, 2026 · 1 source · Watch

Photo: Pexels

At a glance

What they found: Children on a sugar-reduction program were 2.5 times more likely to see their fatty liver disease resolve within 48 weeks than those who didn't.
Who was studied: 146 children, ages 5-14, with non-alcoholic fatty liver disease.

A 48-week trial published November 6, 2026 in Nutrition Journal found that children who cut back on added sugar as part of a broader diet and lifestyle program were 2.5 times more likely to see their fatty liver disease resolve than children who didn't.

27.4% vs 11.0%resolution

2.5xmore likely to resolve

146kids, 48 weeks

3gene variants studied

In a 48-week randomized controlled trial of 146 children ages 5 to 14 with non-alcoholic fatty liver disease, a multicomponent program emphasizing reduced free-sugar intake led to disease resolution in 27.4% of children in the intervention group compared with 11.0% in the comparison group, a relative risk of 2.50 (95% CI 1.18-5.31). Liver disease severity also changed differently over time between the two groups.

A separate cross-sectional study of 242 children examined three gene variants: PNPLA3 GG carriers had 5.33 times higher odds of fatty liver disease, and TM6SF2 CT carriers had 3.33 times higher odds, compared with children without those variants. All three variants studied showed a significant interaction with free-sugar intake, meaning the gene a child carries appeared to change how sugar intake related to liver disease risk. A smaller 15-week crossover trial of 14 children found that a low-free-sugar diet was linked to lower fasting blood sugar, lower triglycerides (a type of blood fat) and lower uric acid compared with each child's usual diet.

Free sugar overloads the liver's capacity to process fructose, which gets converted to fat inside liver cells; cutting that sugar load gives the liver a chance to clear accumulated fat. The authors say genetic variants in genes that control fat processing in the liver may make some children more sensitive to sugar's effects than others, which could help explain differing response speeds.

Fatty Liver Disease Resolution at 48 Weeks

Nutrition Journal, 2026, Xia et al.

The gene-by-diet findings come from a cross-sectional design that can't establish cause and effect, and the crossover trial testing metabolic responses included only 14 children over 15 weeks, with the authors calling those genotype-specific results exploratory. Confirmation in larger studies comes next before genetic testing could guide individual dietary recommendations.

Dr. Axe’s Take

A 2.5-fold jump in fatty liver resolution from cutting added sugar is a usable number for any parent facing this diagnosis, which has become disturbingly common in kids. Liver fat responds to diet changes faster than almost any other tissue, and 48 weeks of real sugar reduction produced a result worth acting on now. What I'd do this week: clear sugary drinks, fruit juice and packaged snacks out of the kitchen and replace them with whole fruit, nuts, eggs and water. Ask a pediatrician to check blood sugar and liver enzymes for a baseline before making changes.

— Dr. Axe

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Study summary

Who: 146 children, ages 5-14, with non-alcoholic fatty liver disease; separate cohort of 242 children for genetic analysis; 14 children in crossover trial
Design: 48-week randomized controlled trial; cross-sectional genetic study; nested 15-week crossover trial
Dose: Multicomponent dietary and lifestyle intervention emphasizing free-sugar reduction
Primary result: NAFLD resolution: 27.4% intervention vs 11.0% comparison at week 48 (RR 2.50, 95% CI 1.18-5.31)
Secondary: PNPLA3 GG: 5.33x higher odds of NAFLD (95% CI 1.93-14.70); TM6SF2 CT: 3.33x higher odds (95% CI 1.04-10.70); low-sugar diet linked to lower fasting glucose, triglycerides, uric acid in 14-child crossover trial
Funding / conflicts: Funded by the 111 project and the National Natural Science Foundation of China. The authors declare no competing interests.
Date: Nov 6, 2026