Adults with type 1 diabetes who replaced animal products with plant-based foods, including those classified as “unhealthful,” experienced significant weight loss, according to a new study published in Frontiers in Nutrition. The research, conducted by the Physicians Committee for Responsible Medicine, revealed that participants on a vegan diet lost an average of 11 pounds over 12 weeks, while those on a portion-controlled diet saw no significant change.
The study analyzed dietary records of 58 adults with type 1 diabetes, comparing the effects of a low-fat vegan diet (with no calorie or carbohydrate restrictions) to a portion-controlled diet (with reduced calorie intake for overweight participants). Researchers evaluated three categories of plant-based diets: overall (PDI), healthful (hPDI), and unhealthful (uPDI).
Participants on the vegan diet increased their intake of healthful plant foods like legumes, whole grains, and fruits, while reducing animal products. Although their consumption of “unhealthful” plant foods (such as refined grains and sweets) did not significantly change, the overall shift to plant-based eating was linked to weight loss. In contrast, the portion-controlled group showed no weight change, despite minor adjustments in whole grain intake.
Dr. Hana Kahleova, lead author of the study, noted, “Replacing animal products with plant-based foods, even less healthy options, supports weight loss in people with type 1 diabetes. For example, orange juice and white bread are still better choices for weight management than eggs and cottage cheese.”
The findings highlight the potential of plant-based diets for weight management in type 1 diabetes, alongside previously documented benefits like improved insulin sensitivity and cholesterol levels. Future research could explore long-term effects and broader health outcomes of such dietary changes.
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