Impact of Portion Control Tools on Portion Size Awareness, Choice and Intake: Systematic Review and Meta-Analysis.

In particular, four studies using calibrated plates [ 58 , 59 , 74 , 76 ] and one study using smaller bowls [ 53 ] were associated with reductions in body mass (BMI and body weight) with a medium effect size ( d = –0.35; 95% CI: –0.51, –0.19; I 2 = 62.03%, 6 comparisons including a calibrated set used in adolescents which failed to reach significance [ 51 ]).

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