Which Diet Controls Blood Sugar Better, Mediterranean or Keto?

When it comes to lowering blood sugar and losing weight, which diet works best? According to a recent study from Stanford University, when dieters were given either the Mediterranean or the Keto diet, each one works as well as the other for controlling blood sugar and ultimately helping people achieve their weight loss goals. But the more restrictive Keto diet is harder to sustain, so ultimately, the doctor who authored the study concluded, that a mostly plant-based diet wins for long-term weight loss since it is easier to follow and sustain than a low-carb diet.

The health effects of these two popular diets, one focusing on low-carb ketogenic meals and the other on a high-fiber balanced approach built on plant-based ingredients central to the Mediterranean diet, showed that both strategies work equally well for weight loss.

The results showed the impact of switching to either a low-carb diet or a high-fiber mostly plant-based diet worked to help 40 participants with type 2 diabetes to control their blood glucose levels over 12 weeks. But a Mediterranean diet has been proven to be both heart healthier as well as more sustainable over time.

“Keto’s more severe carb restrictions did not provide additional overall health benefits,” the study found, “making the Mediterranean diet just as effective and more easily sustained,” according to Methodology CEO, Julie Nguyen.

“Making changes to habitual dietary practices can prove to be daunting for many people, working with Methodology made it easy and we were able to get participants started from day one on getting the diet plans,” said Dr. Gardner of Stanford.

Investigators compared the two diet approaches and their effects on blood glucose, cardiometabolic risk factors, weight loss and nutrition, as well as how easily people can adhere to them.

• The Ketogenic diet – ultra-low-carb, very high-fat diet that involves a drastic reduction in carbohydrate intake.
• The Mediterranean diet – low-carb, moderately high-fat diet that emphasizes vegetables, legumes, fruits, whole grains, olive oil, and fish.

Half the participants started with Ketogenic meals and the other half with Mediterranean meals. After 12 weeks, the groups swapped diets for the remaining 12 weeks. This crossover design allowed the study to have built-in controls.

There were no additional overall health benefits to cutting out legumes, fruits, and whole grains to achieve an ultra-low-carb Ketogenic diet.

For people with diabetes or prediabetes, the less restrictive Mediterranean diet was just as effective in controlling glucose and easier to stay on over time.

“Restricting added sugars and refined grains and emphasizing the inclusion of vegetables should be the focus,” of a healthy diet, said Dr. Gardner. “There’s no reason to restrict heart-healthy, quality carbohydrate foods above and beyond.

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