So a daily, single serving of 100% fruit juice results is a small-but-measurable increase in child BMI (0.01-0.05, roughly 1 ounce), and little to no measurable effect in adults. Given the middling results, i'm surprised how strongly other commenters here are taking this.

> "studies that did adjust for energy intake (-0.08 kg; 95% CI, -0.11 to -0.05 kg; P for meta-regression <.001)"

> "in adults, studies that did not adjust for energy showed greater body weight gain (0.21 kg; 95% CI, 0.15-0.27 kg)"

> "Among cohort studies in children, each additional serving per day of 100% fruit juice was associated with a 0.03 (95% CI, 0.01-0.05) higher BMI"