The Impact of Front-of-Pack Labeling on Social Inequality in Sugar Consumption and Purchase: A Systematic Review.
Ziyao Ge, Claudia H Marck, Adyya Gupta et al.
✦ AI-curated · Sources linked
In 30 seconds
This systematic review assessed whether front-of-pack labeling (FOPL) affects social inequalities in sugar consumption and purchasing. It included 10 randomized and observational studies, all conducted in high- or upper-middle-income countries; eight evaluated warning labels. Every study reported reduced sugar consumption at the population level, but results differed on which socioeconomic groups benefited: some favored higher-income groups, others lower-income groups, and some found U-shaped or no differential effects. Overall study quality was poor, limiting confidence about whether FOPL narrows or widens socioeconomic inequalities.
Key findings
- All 10 included studies reported that FOPL reduced sugar consumption at the population level.
- Five studies found greater benefit among higher-socioeconomic groups, while four found greater benefit among lower-socioeconomic groups.
- Two studies reported a U-shaped socioeconomic effect, and two found no difference by socioeconomic status.
- Eight of the 10 studies evaluated warning labels; overall study quality was poor.
Why it matters
FOPL may support lower sugar consumption overall, but its distributional effects are uncertain. Whether labeling benefits socioeconomic groups equitably matters when assessing population-level prevention strategies. The review’s findings highlight the need to evaluate both overall outcomes and differences between groups, rather than assuming that a population-wide intervention has uniform effects.
What to keep in mind
The evidence base comprised only 10 studies, all from high- or upper-middle-income countries, and overall study quality was poor. Findings on socioeconomic differences were inconsistent.