Vegan Diet Outperforms Mediterranean in Reducing Diabetes Risk, Study Finds

A recent study suggests that a low-fat vegan diet may offer even greater health benefits than the widely acclaimed Mediterranean diet, particularly in reducing the risk of diabetes and promoting weight loss.

The research, conducted by the Physicians Committee for Responsible Medicine and published in Frontiers in Nutrition, reveals that a vegan diet significantly lowers dietary acid load compared to the Mediterranean diet. This reduction is associated with both weight loss and improved metabolic health.

Diet and Diabetes Risk

The study focused on the impact of dietary acid load, a factor linked to weight gain and diabetes risk.

Hana Kahleova, MD, PhD, director of clinical research at the Physicians Committee and lead author of the study, explained, "Eating acid-producing foods like meat, eggs, and dairy can increase the dietary acid load, or the amount of acids consumed, causing inflammation linked to weight gain. But replacing animal products with plant-based foods like leafy greens, berries, and legumes can help promote weight loss and create a healthy gut microbiome."

Study Design

The study involved 62 overweight adults in a randomized crossover trial. Participants followed either a low-fat vegan diet or a Mediterranean diet, with a four-week washout period in between, followed by 16 weeks on the alternate diet. Researchers meticulously analyzed dietary records to calculate dietary acid load using two key scores: Potential Renal Acid Load (PRAL) and Net Endogenous Acid Production (NEAP). Higher scores indicate a higher dietary acid load.

Key Findings

The study's findings highlighted that animal products, including meat, fish, eggs, and cheese, increased acid production in the body. This elevated dietary acid load is associated with chronic inflammation, which can disrupt metabolism and contribute to weight gain.

Conversely, plant-based diets, known for their alkalizing properties, were linked to weight loss, improved insulin sensitivity, and lower blood pressure.

Furthermore, both PRAL and NEAP scores significantly decreased in participants following the vegan diet, while no significant change was observed with the Mediterranean diet. The reduction in dietary acid load was directly correlated with weight loss, even after accounting for changes in energy intake. Participants on the vegan diet experienced an average weight loss of 13.2 pounds, compared to no change on the Mediterranean diet.

Researchers suggest that the vegan diet's alkalizing effect raises the body's pH level, making it less acidic and potentially promoting weight loss.

Foods that contribute to this alkalizing effect include:

• Vegetables (especially leafy greens, broccoli, beets, asparagus, garlic, carrots, and cabbage)
• Fruits (such as berries, apples, cherries, apricots, and cantaloupe)
• Legumes (like lentils, chickpeas, peas, beans, and soy)
• Grains (such as quinoa and millet)