Madeleine Hull
The ketogenic or keto diet is a low-carbohydrate, high-fat diet that has gained popularity in recent years. The diet is advertised as a weight-loss solution, but it is actually a medical diet that comes with serious risks and can be unsafe for certain patients. The keto diet is very strict and difficult to maintain, and there is little evidence to support it as a long-term weight loss solution. The diet typically involves drastically reducing carbohydrate intake and replacing it with fat, which supplies as much as 90% of daily calories. This reduction in carbs puts the body into a metabolic state called ketosis, where the body uses fat as its primary fuel source instead of carbohydrates. While the keto diet can lead to weight loss in the short term, there are concerns about staying on the diet long-term, and it may not be suitable for everyone.
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What You'll Learn
What is a ketogenic diet?
The ketogenic diet, also known as the keto diet, is a low-carbohydrate, high-fat diet. It involves drastically reducing carbohydrate intake and replacing it with fat. Typically, this means limiting carbohydrates to around 20 to 50 grams per day and filling up on fats, such as meat, fish, eggs, nuts, oils, and some low-carb vegetables. The keto diet is different from other low-carb diets, which focus on protein, as it centres on fat, which supplies up to 90% of daily calories.
The keto diet is an extremely strict and challenging diet to maintain. It is advertised as a weight-loss wonder, but it is primarily a medical diet used to treat specific conditions. It has been shown to be effective in reducing the frequency of epileptic seizures in children and may also improve blood sugar management in people with type 2 diabetes. It is also being studied for its potential benefits in reducing symptoms for patients with progressive neurological disorders like Parkinson's disease.
The keto diet can lead to weight loss in the short term, but there is little evidence to support it as a long-term weight-loss solution. Once a normal diet is resumed, the weight is often regained. The diet can also be difficult to sustain as it restricts fresh fruits and vegetables, whole grains, and low-fat dairy, which are important sources of nutrients.
The keto diet has numerous health risks. It is associated with an increase in "bad" LDL cholesterol, which is linked to heart disease. It can also lead to dehydration and stress the kidneys, potentially making underlying conditions worse. Due to these risks, it is important to consult a doctor and a registered dietitian before attempting the keto diet.
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What are the benefits of a ketogenic diet?
The ketogenic diet is a low-carbohydrate, high-fat diet. It typically involves getting 75% of your calories from fat, 5% from carbohydrates, and 15% from protein. The diet includes foods such as meat, fish, eggs, dairy, oils, nuts, and low-carb vegetables.
The keto diet is well-known for its ability to induce weight loss. Research suggests that the keto diet helps people cut calories because it doesn't include many foods that people are likely to overeat. It is also advertised as a weight-loss wonder, and there is anecdotal evidence of people losing weight on the diet. People also report feeling less hungry on the keto diet than on other types of restricted diets.
The keto diet has been used to help prevent seizures in children with epilepsy since the 1920s. It is still used for this purpose today when medications alone are not enough. The diet may also provide other health benefits that come with weight loss. For example, some people with type 2 diabetes find that reducing their carb intake can help with blood sugar and medication management.
Some ketogenic food sources that positively regulate epigenetic activity include cruciferous vegetables, dietary fiber, foods rich in long-chain fatty acids, and berries. The benefits of some of these food sources have a multitude of positive effects. For instance, black raspberries positively affect methylation patterns in the WNT-signaling pathway and profoundly impact the microbiome makeup.
However, it is important to note that the keto diet is extremely strict and difficult to maintain. It comes with health risks and can be unsafe for certain patients. It may also be hard to get all your daily recommended nutrients while following the diet, and it can be difficult to transition off the keto diet without regaining weight.
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What are the risks of a ketogenic diet?
The ketogenic diet is a low-carbohydrate, high-fat diet that has been prescribed to treat seizures in children with epilepsy since the 1920s. More recently, it has gained popularity as a weight-loss tool.
However, the ketogenic diet is extremely strict and difficult to maintain. It also comes with health risks and can be unsafe for certain patients. Before starting a ketogenic diet, it is important to consult a medical professional.
- Nutrient deficiencies: The diet restricts many nutrient-rich foods, including whole grains, fruits, and vegetables. This can lead to deficiencies in vitamins, minerals, fiber, and phytochemicals.
- Increased risk of heart disease: The diet is high in saturated fat, which can increase "bad" LDL cholesterol and the risk of heart disease.
- Kidney stones: Eating a lot of animal foods on the keto diet can lead to more acidic urine and a higher risk of kidney stones.
- Constipation: The diet can be low in fiber, which can lead to digestive discomfort and constipation.
- Low blood sugar: The diet may increase the risk of low blood sugar events, especially in individuals with type 1 diabetes.
- Impaired bone health: Several studies in animals link the keto diet to decreased bone strength and lower bone mineral density.
- "Keto flu": When starting the diet, some people may experience flu-like symptoms such as an upset stomach, dizziness, decreased energy, and mood swings caused by the body's adaptation to ketosis.
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What foods can you eat on a ketogenic diet?
The ketogenic diet is a low-carbohydrate, high-fat diet. It is a very strict and restrictive diet that is difficult to maintain. The diet typically includes animal proteins, dairy, vegetables, other plant-based foods, and fats and oils.
Meat, fish, eggs, cheese, oils, cream, avocado, and nuts are all foods that can be eaten on a ketogenic diet. While on a ketogenic diet, you can also eat small amounts of low-carbohydrate vegetables, such as leafy greens (kale, Swiss chard, spinach), cauliflower, broccoli, Brussels sprouts, asparagus, bell peppers, onions, garlic, mushrooms, lettuce, cucumbers, and summer squashes.
Some fruits, such as berries, can be eaten in small portions. Shirataki noodles are another good option, as they contain less than 1 gram of net carbs and 15 calories per serving.
Dairy products such as Greek yogurt and cottage cheese are also suitable for a ketogenic diet, as they are high in protein and low in carbohydrates. However, it is important to stick to plain yogurt to limit added sugars.
The ketogenic diet is a very low-carb diet, so it is important to carefully track your carbohydrate intake.
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Who should not try a ketogenic diet?
The ketogenic diet is a low-carbohydrate, high-fat diet. It is advertised as a weight-loss wonder, but it is actually a medical diet that comes with serious risks and is not suitable for everyone.
The keto diet is not recommended for people with kidney disease. Dr Cheema says, "there is some suggestion that [the keto diet] can make kidney disease worse over time". McManus, a doctor, also says that the keto diet may overload the kidneys.
The keto diet is also not recommended for people with liver problems. With so much fat to metabolize, the diet could make any existing liver conditions worse.
Additionally, the keto diet is not suitable for patients with diabetes on insulin or oral hypoglycemic agents. Their medication regimen must be properly managed during the initiation of the keto diet, or they may suffer severe hypoglycemia.
The keto diet is also not recommended for people with pancreatitis, inborn disorders of fat metabolism, primary carnitine deficiency, carnitine palmitoyltransferase deficiency, carnitine translocase deficiency, porphyria, and pyruvate kinase deficiency.
The keto diet is extremely strict and difficult to maintain. It is not realistic or sustainable. It restricts fresh fruits and vegetables, whole grains, and low-fat dairy that can help with long-term weight loss and overall health.
Before starting the keto diet, it is important to consult a medical professional and a dietitian to ensure that it is safe for your specific situation.
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Frequently asked questions
A ketogenic or 'keto' diet is a low-carbohydrate, high-fat diet. It involves drastically reducing carbohydrate intake and replacing it with fat. This reduction in carbs puts your body into a metabolic state called ketosis, where the body uses fat as its primary fuel source instead of carbohydrates.
The ketogenic diet is advertised as a weight-loss wonder, and there is evidence that it can be effective in the short term. It may also have benefits for people with type 2 diabetes, epilepsy, and even cancer.
The ketogenic diet is extremely strict and difficult to maintain. It is high in saturated fat, which can increase "bad" LDL cholesterol and lead to higher chances of heart attacks and strokes. It can also be unsafe for certain patients, especially those with kidney disease.
