SynthesisThe British journal of nutrition2023
Downsizing food: a systematic review and meta-analysis examining the effect of reducing served food portion sizes on daily energy intake and body weight.
Synthesis in The British journal of nutrition, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 3 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
19 citing papers in PubMed, 3 syntheses or guidelines pooled it.
- A systematic review of the relationship between portion size and indexes of adiposity in children.Obesity reviews : an official journal of the International Association for the Study of Obesity · 2025Pooled it
- Prevention of Obesity among Adults: Evidence- and Consensus-Based Guideline.Obesity facts · 2025Guideline
- Calorie reformulation: a systematic review and meta-analysis examining the effect of manipulating food energy density on daily energy intake.The international journal of behavioral nutrition and physical activity · 2022Pooled it
- Socioeconomic position and the influence of food portion size on daily energy intake in adult females: two randomized controlled trials.The international journal of behavioral nutrition and physical activity · 2023Trial
- Impact of ADHD on Obesity Treatment Outcomes in Adolescents Receiving Multidisciplinary Care: A Retrospective Longitudinal Study.Pediatric obesity · 2026Article
- Impact simulation of portion guidance on commonly consumed packaged food to reduce discretionary energy and public health sensitive nutrients in the United States, United Kingdom, and France.European journal of nutrition · 2026Article
- Are weight control and food waste a trade-off?: A clustering of pre-meal portion planning and plate-clearing behaviors among Japanese adult consumers.European journal of nutrition · 2025Article
- "The Big Three" properties of food that drive intake.Physiology & behavior · 2025Review
- Effect of a portion-size default nudge on meat consumption and diner satisfaction: controlled experiments in Stanford University dining halls.BMC public health · 2025Article
- Evidence on the effectiveness and equity of population-based policies to reduce the burden of type 2 diabetes: a narrative review.Diabetologia · 2025Review
- Total Fat and Fatty Acid Content in Meals Served by Independent Takeaway Outlets Participating in the Healthier Catering Commitment Initiative in London, UK.International journal of environmental research and public health · 2025Article
- Method to define recommended portion sizes for consumer guidance.European journal of nutrition · 2025Article
- The Cerebellar Response to Visual Portion Size Cues Is Associated with the Portion Size Effect in Children.Nutrients · 2024Article
- Children's Energy Intake Generally Increases in Response to the Energy Density of Meals but Varies with the Amounts and Types of Foods Served.The American journal of clinical nutrition · 2024Article
- Effects of an oral biodegradable device used for 12 weeks on weight reduction, cardiovascular risk factors, satiety, snacking, and meal size.Obesity pillars · 2023Article
- Obesity and malnutrition in children and adults: A clinical review.Obesity pillars · 2023Review
- Snacking Behaviours of Australian Young Adults: Secondary Analysis of the MYMeals Cross-Sectional Study.Nutrients · 2023Article
- Children with lower ratings of executive functions have a greater response to the portion size effect.Appetite · 2023Article
- Is the effect of menu energy labelling on consumer behaviour equitable? A pooled analysis of twelve randomized control experiments.Appetite · 2023Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Portion sizes of many foods have increased over time. However, the size of effect that reducing food portion sizes has on daily energy intake and body weight is less clear. We used a systematic review methodology to identify eligible articles that used an experimental design to manipulate portion size served to human participants and measured energy intake for a minimum of 1 d. Searches were conducted in September 2020 and again in October 2021. Fourteen eligible studies contributing eighty-five effects were included in the primary meta-analysis. There was a moderate-to-large reduction in daily energy intake when comparing smaller
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.