A long-term “Food is Medicine” initiative operated by the Mass General Brigham Revere Community Health Center in Revere, Massachusetts, has demonstrated significant improvements in cardiometabolic health among adults, as indicated by a recent study published in the journal Preventing Chronic Disease. The research found that sustained access to free, high-quality, plant-based groceries is effective in reducing diastolic blood pressure, body weight, and body mass index over periods of years rather than weeks.
Read More
The program, which collaborates with the Greater Boston Food Bank, provided nearly 379,000 pounds of food in the past year. Participating patients received weekly grocery packages at no cost, which they could continue to receive indefinitely. On average, participants received food for 2.7 years, a notably long duration for nutritional interventions in clinical research.
Each grocery package was tailored by dietitians to align with the USDA 2020 Dietary Guidelines, containing fresh fruits, vegetables, canned beans, nut butter, and whole grains, calibrated to supply three meals daily for each household member. This comprehensive approach aimed to replace or significantly supplement the entire food supply with nutrient-dense plant-based options.
Researchers analyzed health data from 68 adult participants who received an average of 97 grocery packages during their enrollment. They focused on standard cardiometabolic measures, including blood pressure, body weight, body mass index, and hemoglobin A1c, a key marker for diabetes management. Due to variations in participants' duration in the program and the number of packages received, the study was able to assess whether health outcomes increased with the total amount of nutritional support provided.
Findings indicated a clear dose-response relationship: for every additional 100 packages received, there was an average reduction of 3.21 mm Hg in diastolic blood pressure, a decrease of 2.6 kg in body weight, and a reduction of 1.04 kg/m² in body mass index. Additionally, participants with elevated blood pressure at the beginning of the program experienced reductions in systolic blood pressure. These modifications are clinically significant and suggest that even modest individual changes can lead to substantial population-level health benefits.
Despite these improvements, the study did not find significant changes in hemoglobin A1c levels. This lack of change may be due to various factors, including the population's baseline health status. Therefore, the authors caution that dietary interventions may not yield uniform results across all metabolic health markers, highlighting the need for further investigation.
The study’s distinctive aspect lies in its long-term follow-up; previous “Food is Medicine” research typically examined short-term interventions. By tracking participants over an average of 2.7 years, the Revere study revealed that benefits from food-based interventions may accumulate over time. Lauren Fiechtner, MD, MPH, the study's senior author, emphasized the promise of plant-based food interventions for enhancing cardiovascular and metabolic health, advocating for longer duration programs.
First author Jacob Mirsky, MD, MA, echoed this sentiment, suggesting that the findings challenge the design of nutrition interventions to prioritize sustained and quality food distribution over brief programs. He pointed out that concentrating resources on high-quality, long-term food support could better reshape participants' diets and enhance their health outcomes.
While the study design had limitations, including its non-randomized approach, the consistency of the dose-response correlation reinforces the findings. As health systems look for effective ways to address diet-related chronic diseases, the Revere initiative illustrates how a food pantry—backed by community partnerships and clinical nutrition expertise—can play a crucial role in preventive medicine.