Madeleine Hull
The ketogenic (keto) diet is a popular low-carbohydrate, high-fat diet that has been shown to be effective in managing Type 2 diabetes by lowering blood sugar and promoting weight loss. However, the restrictive nature of the keto diet, which involves drastically reducing carbohydrate intake, can make it challenging to follow long-term. While some people with diabetes may benefit from the keto diet's ability to control blood sugar and aid in weight loss, it is not recommended by health authorities in the United States as a diabetes management strategy. The decision to follow the keto diet should be made after considering the potential benefits and risks and consulting with a healthcare professional.
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What You'll Learn
Pros and cons of the keto diet for diabetics
The keto diet is a popular low-carb diet trend. It is very low in carbohydrates and very high in fat. The diet typically involves getting 70% of calories from fat-rich foods like nuts, avocados, and cream, 20% from protein foods like salmon, eggs, and cheese, and less than 10% from carbohydrates like fruits, vegetables, beans, and grains.
Pros
The keto diet may benefit people with type 2 diabetes in the following ways:
- The diet severely restricts carbohydrates, preventing spikes in blood sugar after eating and making it easier to maintain healthy blood sugar levels.
- It can lead to rapid weight loss when followed properly, which can help people with diabetes.
- There is growing evidence to suggest that the keto diet can be good for people with type 2 diabetes.
Cons
However, there are several drawbacks and potential dangers of the keto diet for people with diabetes:
- The keto diet is highly restrictive, which can make it difficult to follow in the long term.
- The restrictive nature of the diet means that it may lead to nutrient deficiencies due to the restriction or exclusion of certain food groups.
- One of the biggest dangers of ketosis for people with diabetes is the risk of hypoglycemia or low blood sugar, especially if they are also taking insulin or other blood sugar-lowering medications.
- The keto diet can potentially increase LDL ("bad") cholesterol levels, which raises the risk of heart disease.
- Experts do not currently recommend the keto diet for type 2 diabetes management.
- The keto diet may not be the best long-term strategy to manage diabetes.
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Risks of keto for diabetics
Diabetics considering a keto diet should be aware of the following risks:
Lack of research on long-term effects: While there is promising short-term evidence supporting the use of ketogenic diets for diabetes management, there is a lack of research on the long-term efficacy and safety of this diet. This is a common issue with all dietary approaches for diabetes management due to the logistical problems in conducting long-term studies.
Restrictive nature: The keto diet is highly restrictive, which can make it challenging to follow in the long term. It may be more beneficial to follow a more moderate and sustainable diet and lifestyle program. Light to moderate but sustained weight loss through a balanced diet and exercise can help with glycemic control in people with type 2 diabetes.
Potential side effects: When transitioning to a keto diet, some people may experience short-term side effects, commonly known as the "keto flu." In rare cases, people with type 1 diabetes may experience hypoglycemia (low blood sugar) and dyslipidemia (high levels of lipids in the blood). Unmanaged diabetes, especially type 1, combined with the keto diet, increases the risk of diabetic ketoacidosis (DKA), a life-threatening complication.
Nutrient deficiencies: The keto diet restricts or excludes certain food groups, which can lead to nutrient deficiencies. It prohibits legumes, fruits, and whole grains, which are considered nutrient-dense and healthy. This can result in a lack of essential vitamins and minerals, requiring supplementation.
Increased risk of cardiovascular disease: People with diabetes are already at a higher risk of cardiovascular disease. The long-term increase in saturated fat intake associated with the keto diet may further elevate this risk. Studies have shown that participants with the lowest carbohydrate intake had the highest risk of cardiovascular disease. Therefore, caution should be exercised when considering this diet.
Bone and calcium metabolism issues: Recent studies have reported significant early changes in bone and calcium metabolism in adults and children following a ketogenic diet. This could potentially lead to issues such as osteopenia and an increased risk of bone fractures, especially in elderly and postmenopausal women, who are already at a higher risk due to diabetes.
It is crucial for diabetics to consult with their healthcare professionals before starting a keto diet to weigh the pros and cons and ensure it aligns with their personal preferences, needs, and clinical health targets.
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Carbohydrate intake on a keto diet
The keto diet is a low-carbohydrate, high-fat diet that can help with weight loss and improve health parameters associated with excess weight, such as insulin resistance, high blood pressure, and elevated cholesterol. The diet typically recommends reducing carbohydrate intake to between 20 and 50 grams per day, which is significantly lower than the average carbohydrate intake of most people. This restriction on carbohydrates causes the body to burn fat for energy instead of carbs, leading to a state called ketosis, which can result in weight loss.
While the specific ratio of macronutrients in the keto diet may vary, it generally involves getting about 70-80% of calories from fat, 5-10% from carbohydrates, and 10-20% from protein. This means that on a 2,000-calorie diet, a person would consume about 165 grams of fat, 40 grams of carbohydrates, and 75 grams of protein. It is important to note that the keto diet is very restrictive and may be challenging to follow in the long term due to the limited variety of foods available.
Some people with type 2 diabetes may consider the keto diet as a possible blood sugar management option. The diet's low-carbohydrate nature can help manage blood glucose levels and aid in weight loss, which can be beneficial for those with type 2 diabetes. However, experts do not currently recommend the keto diet for type 2 diabetes management due to its restrictive nature and potential risks. There have been reports of ketoacidosis occurring in people with type 2 diabetes who followed the keto diet with prolonged fasting periods. Additionally, the long-term efficacy and safety of the keto diet for diabetes management have not been extensively studied.
It is always advisable to consult a healthcare professional or a registered dietitian before starting any new diet, especially for those with specific health conditions like diabetes. They can help individuals choose a diet plan that aligns with their lifestyle, preferences, and health goals, ensuring their clinical health targets, such as blood sugar levels and weight management, are met.
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Comparison with other diets
The keto diet is a popular low-carb diet that involves a drastic reduction in carbohydrate intake. It is a very high-fat diet, with 70% of calories coming from fat-rich foods like nuts, avocados, and cream. Another 20% of calories come from protein foods like salmon, eggs, and cheese. Less than 10% of daily calories come from carbohydrates like fruits, vegetables, beans, and grains.
The keto diet has been shown to be effective for managing Type 2 diabetes by lowering blood sugar and promoting weight loss. However, it is highly restrictive, which can make it difficult to follow in the long term. There is also a lack of research on its long-term efficacy and safety, and it may not be suitable for everyone.
The Mediterranean diet is often recommended for managing diabetes. It is a low-carb, moderately high-fat diet that emphasizes vegetables, legumes, fruits, whole grains, olive oil, and fish. It is less restrictive than the keto diet and includes more nutrient-dense foods. The Mediterranean diet has been shown to be effective in controlling blood glucose levels and aiding weight loss, similar to the keto diet, but without the same level of restriction.
The UK National Institute for Health and Care Excellence (NICE) guidelines promote 'general healthy eating' for Type 2 diabetes management, encouraging high-fiber, low-glycemic index sources of carbohydrates and limiting saturated fat intake. This approach is similar to the Mediterranean diet and focuses on a balanced and varied diet rather than strict carbohydrate restriction.
Other low-carb diets have also been suggested for diabetes management, but there is a lack of consensus on how low carbohydrate consumption should go and which carbohydrate-rich foods to include. Additionally, these diets may eliminate certain food groups that are considered nutrient-dense and healthy, such as legumes, fruits, and whole grains.
Overall, while the keto diet can be effective for managing Type 2 diabetes, it is important to consider other diets that may be easier to maintain and provide similar benefits. The Mediterranean diet and the approach recommended by NICE offer less restrictive and more well-rounded options for managing diabetes through diet.
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Long-term efficacy of keto for diabetics
A ketogenic diet is a very low-carbohydrate, high-fat diet that can help manage blood sugar levels in people with diabetes. The diet typically involves limiting carbohydrates to 20-50 grams per day, which is about 80% less than the usual intake. While the keto diet has shown promising results in the short term for people with type 2 diabetes, there is limited research on its long-term efficacy and safety.
Some studies have shown that the keto diet can lead to a progressive decrease in adherence over time due to its restrictive nature and the monotony of food choices. This is particularly true for people in the Mediterranean region, where consumption of fruits and vegetables is very common, and the keto diet restricts these food groups. Additionally, there are certain groups of people who should not follow a keto diet, including those with increased levels of high-density lipoprotein (HDL) cholesterol.
However, there are some long-term benefits of the keto diet for people with type 1 diabetes. A 10-year case study showed that the keto diet resulted in successful glycemic control and a 43% decrease in insulin requirements without adverse effects. The sustained improvement in glycemia and reduced insulin load improved whole-body insulin sensitivity, likely decreasing the risk of adverse microvascular and macrovascular outcomes.
While the keto diet may provide therapeutic benefits for people with type 1 diabetes, more research is needed to determine its long-term efficacy and safety for people with type 2 diabetes. It is important for individuals to consult with healthcare professionals and registered dietitians to individualize their diet plans based on their specific needs and preferences.
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Frequently asked questions
A keto diet is a low-carbohydrate, high-fat diet. It involves drastically reducing carbohydrate intake and replacing it with fat and protein.
By reducing carbohydrate intake, a keto diet prevents spikes in blood sugar levels and makes it easier to maintain healthy blood sugar levels.
Yes, the keto diet can lead to hypoglycemia or low blood sugar, especially if the individual is also taking insulin or other blood sugar-lowering medications. It may also increase LDL (bad) cholesterol levels, which can raise the risk of heart disease. Additionally, the restrictive nature of the keto diet can make it challenging to follow long-term.
Alternatives to the keto diet for managing diabetes include the Mediterranean diet, which emphasises fruits, vegetables, whole grains, legumes, nuts, and moderate amounts of lean protein and healthy fats. A healthy, balanced diet with plenty of fresh fruits and vegetables, smaller meals, and evenly spaced carbohydrate intake is also recommended.
Yes, it is essential for diabetics to consult with their doctor or a registered dietitian before starting any restrictive diet like the keto diet. Healthcare professionals can help individuals understand the potential risks and benefits and determine if the keto diet is suitable for their specific needs and lifestyle.
