Madeleine Hull
The ketogenic, or keto, diet is a low-carb, high-fat diet that has been around since the 1920s. It aims to drive the body into a metabolic state called ketosis, where the body burns stored fat as energy instead of carbohydrates. While the keto diet has been proven to reduce seizures in children with epilepsy, it is now more commonly used as a weight-loss tool. However, it may not be suitable for everyone, and it is important to consult a medical professional before starting any new diet. Diabetics, in particular, should be cautious due to the diet's effect on blood sugar. The keto diet is also being studied for its potential benefits in reducing symptoms for patients with progressive neurological disorders like Parkinson's disease.
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What You'll Learn
Diabetics and those with blood sugar issues
The keto diet was created in the 1920s as a treatment for epilepsy, but its effects are now being studied for other health conditions, including diabetes. The diet aims to drive the body into a metabolic state called ketosis, where the body burns stored fat as a source of energy instead of carbohydrates. This is achieved by reducing carbohydrate intake to less than 50 grams per day, with some people needing to restrict their intake to just 20 grams per day to reach and maintain ketosis.
While the keto diet can be beneficial for diabetics, it is not without its risks and drawbacks. It can increase LDL ("bad") cholesterol and decrease nutrient intake, particularly fibre, folate, vitamin C, magnesium, and vitamin B6. It can also cause short-term side effects like nausea, vomiting, and fatigue. In rare cases, people with Type 1 diabetes may experience low blood sugar. Therefore, it is crucial to consult a doctor or dietitian before starting the keto diet to ensure it aligns with your health goals and minimises risks.
Additionally, the keto diet can be challenging to stick to due to its stringent food restrictions. It eliminates entire food groups, such as grains, beans, fruits, and starchy vegetables. This can make it difficult to obtain certain nutrients and may require careful planning to ensure a well-rounded diet.
Overall, while the ketogenic diet may be beneficial for diabetics and those with blood sugar issues, it should be approached with caution and under medical supervision. It is essential to work with a healthcare professional to tailor the diet to your individual needs and monitor your blood sugar levels closely.
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People with kidney or liver disease
While the ketogenic diet has become a popular weight-loss regimen, it may not be suitable for people with kidney or liver disease. The diet is high in fat, with moderate protein content and very few carbohydrates. This composition may cause an increase in kidney stones and metabolic acidosis, which can accelerate the decline of kidney function. Thus, it is recommended that those with prior kidney disease or at high risk of developing kidney disease carefully consider the diet.
In the case of liver disease, the ketogenic diet may be beneficial in treating nonalcoholic fatty liver disease (NAFLD). Weight loss is the main treatment for NAFLD, and the keto diet can assist in this regard while also helping to prevent fatty liver disease and reverse fatty liver damage. However, MCT oil, which is high in saturated fats and is often derived from coconut, should be avoided by those with liver conditions.
The ketogenic diet can also lead to vitamin and mineral deficiencies, so it is important to consult a doctor or dietitian before starting the diet to limit potential deficiencies and discuss supplements. Those with kidney or liver disease should be especially cautious and consider alternative diets that have less potential risk and more evidence of safety, such as the Mediterranean or plant-based diets.
Overall, while the ketogenic diet may offer some benefits for people with liver disease, it may pose risks for those with kidney disease. It is essential to consult a healthcare professional before starting any new diet, especially for those with pre-existing health conditions.
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Those with epilepsy
The ketogenic diet has been used to treat epilepsy, particularly in children with drug-resistant epilepsy, since the 1920s. The diet is thought to reduce the frequency and intensity of seizures by driving the body into a metabolic state called ketosis, where the body uses stored fat as its primary energy source instead of carbohydrates.
To reach and maintain ketosis, the body's carbohydrate intake must be restricted. On the keto diet, this typically means reducing total carbohydrate intake to less than 50 grams per day, or even as low as 20 grams per day. This means eliminating all bread, pasta, rice, cereals, conventional baked goods, legumes, beans, root vegetables, sweetcorn, most fruits, and starchy vegetables.
The keto diet is high in fat, with roughly 70 to 80 percent of calories coming from fat sources, and moderate in protein, with 10 to 20 percent of calories coming from protein. Foods that are generally allowed on the keto diet include high-fat meats, processed meats, fish, oils, lard, butter, nuts, high-fat dairy (such as cheese), and low-carb vegetables such as leafy greens.
While the keto diet has been shown to be effective in reducing seizures in children with epilepsy, it is not without its risks and drawbacks. The diet can be difficult to stick to due to its stringent food restrictions, and stopping the diet can lead to weight regain. Additionally, the keto diet may not be suitable for those with kidney or liver disease, as it can lead to complications such as ketoacidosis.
It is important to consult with a medical professional before starting the keto diet, especially for those with epilepsy, to ensure that it is safe and appropriate for their individual needs and health concerns. Working with a registered dietitian nutritionist can also help limit potential vitamin and mineral deficiencies that may result from the diet's food restrictions.
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Individuals wanting to lose weight
The ketogenic diet has become a popular way to lose weight. The diet involves eating a very low amount of carbohydrates and replacing them with fats, with the goal of promoting the body's fat-burning process. Typically, 70-80% of your calorie intake will come from fats, 10-20% from protein, and 5-10% from carbohydrates.
The keto diet can be an effective tool for weight loss when used in a short time period, followed by the adoption of healthier eating habits. However, it is important to note that once people stop following the keto diet, they are likely to regain at least half of the weight they lost. Therefore, it is not recommended as a long-term solution for weight loss.
To reach and remain in a state of ketosis, where the body burns stored fat as a source of energy instead of carbohydrates, carbs must be restricted. While certain people might only achieve ketosis by eating 20 grams of carbs per day, others may be successful with a slightly higher carb intake. Generally, the lower your carbohydrate intake, the easier it is to reach and stay in ketosis.
When following the keto diet, it is important to choose a mixture of both fresh and frozen low-carb vegetables, such as mushrooms, cauliflower, broccoli, greens, peppers, onions, and tomatoes. Healthy fats such as olive oil and MCT oil may aid with weight loss and promote ketosis. It is also important to plan meals ahead of time and stick to a shopping list to avoid non-keto-friendly foods.
Before starting the keto diet, it is essential to consult a medical professional to ensure it is appropriate and safe for you. The keto diet may not be suitable for everyone, especially those with kidney or liver disease, or those with type 1 diabetes as it can lead to diabetes-related ketoacidosis.
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People with heart conditions
The ketogenic diet is a low-carbohydrate, high-fat diet that has been around since the 1920s. It is well known for its ability to induce weight loss and has been prescribed to treat seizures in children with epilepsy.
The ketogenic diet is not recommended for everyone and may not be safe for people with heart disease. The diet's extreme restriction of carbohydrates can have a ripple effect on your heart and overall health. Carbohydrates are broken down into glucose, which increases blood sugar. When you limit carbohydrates long-term, your pancreas produces less insulin, a hormone that helps regulate blood sugar. While this can lead to better blood sugar control in the short term, when you start eating carbohydrates again, you may develop insulin resistance, which raises your risk of developing type 2 diabetes.
In addition, the keto diet has been shown to increase LDL ("bad") cholesterol, which is associated with a higher risk of heart disease, stroke, and other cardiovascular problems. This increase in LDL cholesterol is particularly concerning for people with existing heart disease or increased cardiovascular risks.
According to a 2019 study from the American College of Cardiology, people whose carbohydrate intake was 44% or less of overall calories had an increased risk of irregular heart rhythms. Another meta-analysis from 2018 showed that low-carbohydrate diets are associated with early death from heart and blood vessel disease.
Furthermore, the vitamin K found in leafy greens, which are consumed in large amounts on the keto diet, may interfere with the anti-clotting drug warfarin taken by some heart patients. Additionally, drugs known as SGLT-2 inhibitors, used to treat diabetes and heart failure, may be incompatible with a keto diet.
Therefore, it is important to consult a medical professional before starting the keto diet, especially if you have a heart condition. While the diet may be effective for weight loss in the short term, it may not be safe for long-term use, especially for those with heart problems, as it can increase health risks.
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Frequently asked questions
The ketogenic diet is not recommended for everyone. Diabetics and anyone with a blood sugar management issue should consult their GP and healthcare team before starting a keto diet. People with kidney and/or liver disease or a family history of such should also consult a medical professional before starting.
The keto diet is a popular way of eating that involves consuming a very low amount of carbohydrates and eating more fat, with the goal of promoting the body's fat-burning process. The diet has been proven to reduce seizures in children with epilepsy and is now also used as a weight-loss tool.
The keto diet is generally not a long-term solution. It can be hard to stick to due to stringent food restrictions. When stopping the diet, people tend to regain at least half of the weight they lost. The keto diet can also lead to vitamin and mineral deficiencies, and other temporary symptoms such as keto flu, leg cramps, digestive issues, and bad breath.
Foods that are generally allowed include high-fat meats, processed meats, fish, oils, lard, butter, nuts, high-fat dairy such as cheese, and low-carb vegetables such as leafy greens, as well as specific fruits such as avocado.
Foods to avoid on the keto diet include bread, pasta, rice, cereals, baked goods, legumes, beans, root vegetables, sweetcorn, most fruits, and starchy vegetables such as potatoes.
