Whether 100% fruit juice consumption causes weight gain in children remains controversial.


To determine the association between 100% fruit juice consumption and change in BMI or BMI z score in children.


PubMed, Embase, CINAHL, and Cochrane databases.


Longitudinal studies examining the association of 100% fruit juice and change in BMI measures were included.


Two independent reviewers extracted data using a predesigned data collection form.


Of the 4657 articles screened, 8 prospective cohort studies (n = 34 470 individual children) met the inclusion criteria. Controlling for total energy intake, 1 daily 6- to 8-oz serving increment of 100% fruit juice was associated with a 0.003 (95% CI: 0.001 to 0.004) unit increase in BMI z score over 1 year in children of all ages (0% increase in BMI percentile). In children ages 1 to 6 years, 1 serving increment was associated with a 0.087 (95% confidence interval: 0.008 to 0.167) unit increase in BMI z score (4% increase in BMI percentile). 100% fruit juice consumption was not associated with BMI z score increase in children ages 7 to 18 years.


All observational studies; studies differed in exposure assessment and covariate adjustment.


Consumption of 100% fruit juice is associated with a small amount of weight gain in children ages 1 to 6 years that is not clinically significant, and is not associated with weight gain in children ages 7 to 18 years. More studies are needed in children ages 1 to 6 years.

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