Interest in low-carb diets has exploded, particularly in those aiming to manage or avoid type 2 diabetes. With all the diets available, the ketogenic (keto) and Mediterranean diets have emerged as two of the most discussed methods. But which one works best for blood sugar management, weight reduction, and overall long-term health? Let’s dissect the science, the advantages, and some real-world issues with each one.
Learning About Ketosis and the Keto Diet
Ketosis is when your body transitions from utilizing carbs for fuel to using fat instead. Normally, we use glucose from carbs for fueling our bodies. However, when carb consumption falls significantly—typically under 50 grams a day—the glucose level is low, and your body begins to break down fat into ketones, which supply fuel for the brain and muscles.
The keto diet is designed around this process. It’s high in fat (about 70 to 80 percent of your daily calories), moderate in protein, and very low in carbs. That means saying goodbye to bread, pasta, most fruits, and even some vegetables. Instead, you’ll be eating foods like meat, fish, eggs, nuts, seeds, cheese, and healthy oils.
Keto Diet and Diabetes: The Benefits
For diabetics, the keto diet can be of real benefit. Reducing carbs can prevent spikes in blood sugar and reduce overall glucose levels, making diabetes simpler to control—and in some instances, even diminish the need for medication.
The keto diet has also been associated with weight reduction, which is a win-win for individuals with type 2 diabetes, as weight reduction enhances the sensitivity of insulin. While some studies indicate that it might increase HDL (the “good” cholesterol) and decrease triglycerides, both of which are associated with improved cardiovascular health.
There is even some indication that ketosis might support brain health, especially in illnesses such as epilepsy and potentially even Alzheimer’s disease.
Risks and Challenges of the Keto Diet
Nevertheless, the keto diet has its negative aspects. One of the most significant drawbacks is how restrictive it is. Cutting out entire food groups such as fruits, legumes, and whole grains can be challenging to adhere to, particularly over time. Home cooking becomes a near-necessity, and dining out poses challenges.
Nutritionally, keto can fall short as well. Research has determined that individuals eating a keto diet tend to lack fiber and essential vitamins, including thiamin, B6, C, D, and E. Vitamin B12 is more prevalent, but that’s largely due to the diet’s emphasis on animal foods.
For diabetics, there are a few critical risks to be aware of. Hypoglycemia—hazardously low blood sugar—can occur, especially for those taking insulin or other drugs. There is also the risk of creating diabetic ketoacidosis, a severe condition in which ketones build up too high. This is generally more of an issue for those with type 1 diabetes. Certain studies have even found links between keto and greater levels of LDL (the “bad” cholesterol) in some individuals.
Mediterranean Diet: A Softer Touch
The Mediterranean diet follows a balanced course. It’s lower in carbohydrates than the average American diet, but not exclusive. It emphasizes whole, minimally processed foods such as vegetables, legumes, fruits, whole grains, nuts, seeds, fish, and olive oil.
This diet is high in fiber, necessary vitamins, and good fats. It’s also not as restrictive, which makes it simpler for most individuals to stick to long-term. You don’t need to eliminate entire food groups, so you can have more variety and still stay healthy.
When diabetes is concerned, the Mediterranean diet has quite a record to back it up. It’s been demonstrated to help control blood sugar levels, aid in weight loss, and reduce cholesterol. It’s also linked to less risk of heart disease—something particularly critical for diabetic individuals.
Keto vs. Mediterranean: What the Research Shows
A new study, however, conducted by Stanford Medicine’s Christopher Gardner compared the two diets in type 2 diabetic and prediabetic adults. Participants ate each diet for 12 weeks, with meals provided for the first month to support them in getting into the swing of things.
Both diets created comparable improvements in blood sugar management, weight loss, and other important health indicators. The keto diet had a slightly larger reduction in triglycerides, and the Mediterranean diet reduced LDL cholesterol more—a victory for heart health.
But when it came to sustainability, the Mediterranean diet was the winner. Some participants found the keto diet too restrictive and did not continue it after the trial, but most just kept on eating more Mediterranean-looking foods. The researchers reported that eliminating healthy carbs such as fruit, legumes, and whole grains did not provide any additional benefits.
Practical Takeaways for Choosing a Diet
If you are attempting to control diabetes, both the Mediterranean and keto diets can assist with blood sugar management and weight reduction. The keto diet can potentially burn fat quicker, but it is more restrictive and may not have some essential nutrients. The Mediterranean diet is simpler to stick with, has a broader variety of nutrients, and still offers great results for blood sugar and cardiovascular well-being.
Eliminate added sugars and refined grains, and fill up on veggies, healthy fats, and whole foods. You don’t need to eliminate carbs—just ensure that the ones you do consume are health-promoting and compatible with your lifestyle.