Vegetarian Diet Helps Balance Blood Sugar

Well-balanced vegetarian diets have been proven to provide many health benefits, including improving glycemic control in patients with type 2 diabetes. There are many different types of vegetarian diets; a vegan diet is a type of vegetarian diet that includes only plant foods such as fruits, vegetables, legumes, grains, seeds and nuts. A recent study compared the effect of a vegan diet and conventional diabetic diet on glycemic control.

The 12-week study included 93 participants with type 2 diabetes. The participants were randomly assigned to follow either a vegan diet or a conventional diet recommended by the Korean Diabetes Association. The vegan diet consisted of whole grains, vegetables, fruit and legumes. The patients in the vegan group were asked to avoid white, processed foods and all animal products. The participants were educated on which vegan foods to include and avoid but the amount, frequency, energy intake and portion size were not restricted over the twelve weeks.

Participants in the conventional diet group were asked to restrict their energy intake based on weight, physical activity and need for weight control. Their total caloric intake was comprised of 50-60 percent carbohydrate, 15-20 percent protein and less than 25 percent fat. Daily energy requirement and proportion of food categories were distributed into three meals and snacks between meals.

Results showed that both the vegan and conventional diets were effective at significantly reducing hemoglobin A1C levels (average blood sugar control over past two to three months) among participants. However, compared to the conventional diet, the vegan diet appeared more effective for glycemic control. In particular, the vegan diet group with high compliance showed a markedly decreasing trend in hemoglobin A1C levels. Additionally, this benefit was seen even after adjusting for energy intake and waist circumference over the 12-week period between the two groups. This indicates that a vegan diet may have additional benefits beyond low energy intake and weight loss. 

Bottom Line: Following a vegan diet was more effective for glycemic control among patients with type 2 diabetes than the conventional diet recommended by the Korean Diabetes Association. However, compliance for the vegan diet group was lower than the conventional group. Dietary choices are personal and there is no one-size-fits-all approach when it comes to nutrition. While a vegan diet may not be the right fit for everyone, research shows that incorporating more plant based foods into one’s diet may help improve glycemic control for patients with diabetes and offer additional health benefits such as lower risk for obesity, coronary heart disease and high blood pressure.

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