Summary: In a randomised trial in people with diabetes facing food or financial insecurity, a monthly grocery voucher modestly increased whole-fruit intake and reduced refined grains, but overall diet quality and HbA1c did not change significantly.
PICO Summary
| Element | Detail |
|---|---|
| Population | Patients with diabetes or prediabetes facing food or financial insecurity; sampled from a larger trial, 6-month follow-up, Canada. |
| Intervention | Monthly grocery voucher for healthy foods, with diet assessed by the Canadian Diet History Questionnaire III. |
| Comparison | No voucher (control). |
| Outcome | Voucher recipients ate more whole fruit (+0.8 daily servings; 95% CI 0.1–1.6) and fewer refined grains (-1.0; 95% CI -1.9 to -0.1). Overall diet-quality score (HEFI-2019) did not differ (52.4 vs 51.0; CI crossed null), and HbA1c change was not significant (-0.4; 95% CI -1.4 to 0.5). |
Grocery voucher and diet in diabetes
RCT · food-insecure diabetes · 6 months
A monthly grocery voucher modestly raised whole-fruit intake and cut refined grains, but overall diet quality and HbA1c did not significantly change.
Expert Commentary
This is a worthwhile trial addressing something prescriptions cannot fix: the simple fact that healthy food costs money many of my patients do not have. The premise that a grocery voucher could improve diet in food-insecure people with diabetes is both humane and testable, and the results are honestly modest, more whole fruit and fewer refined grains, which are real if small dietary improvements. The candid part, which the summary rightly preserves, is that the broader markers did not move: overall diet quality was statistically unchanged and HbA1c did not significantly improve, with confidence intervals crossing null. That is unsurprising given the small sample drawn from a larger study and a six-month window, but it cautions against overselling vouchers as a glycaemic intervention. The likely truth is that money helps at the margins but that food insecurity sits within a web of barriers, knowledge, time, access, competing costs, that a voucher alone does not dissolve. Can I use this with my patients? Yes, as part of social-needs care. It supports advocating for food-access support in food-insecure diabetic patients as a reasonable, low-harm measure, while being honest that on current evidence it produces small dietary shifts rather than proven changes in control, and that larger trials are needed.
References
Buadu A, Ul Haq MZ, Sinha L, Sabir A, Gucciardi E, Persaud N. Assessing the effect of a food voucher on the dietary intake of patients with diabetes using the Canadian Diet History Questionnaire III: a randomized control trial. Nutrients. 2025;17(17):2865. doi:10.3390/nu17172865