Nutrition and health canteen intervention linked to weight reduction in middle-aged adults

A single-group before–after study evaluated a 12-week multifaceted lifestyle intervention delivered through a nutrition and health canteen in China. The study enrolled 97 middle-aged adults (33 women). The intervention featured increased food diversity, reduced supply of salt/sugar/oil, and structured health education on diet and physical activity. There was no comparator group.

The primary outcome was change in body weight. Median body weight decreased from 74.00 kg (interquartile range 61.05–81.6) at baseline to 72.35 kg (58.83–80.15) after the intervention, a statistically significant reduction (p < 0.001). At baseline, 44.3% (43 individuals) were classified as overweight and 8.4% (8 individuals) as obese. Changes in overweight prevalence were not reported. Secondary outcomes included food frequency, anthropometrics, blood biochemistry, and inflammatory biomarkers, but specific results for these were not provided in the input.

Safety and tolerability data were not reported. Key limitations include the single-group before–after design, which lacks a control group for comparison, and the short 12-week duration. These factors prevent assessment of causality and long-term effects. Funding sources and conflicts of interest were not reported.

In practice, this study suggests a structured canteen-based strategy may be a feasible model for delivering lifestyle components in specific collective settings. However, the low certainty of evidence due to the observational design and absence of randomization means results should be interpreted as showing an association only, not a proven causal effect. Generalizability beyond similar Chinese collective catering environments is uncertain.