Madeleine Hull
The ketogenic (keto) diet is a popular low-carbohydrate, high-fat eating plan often used for weight loss. The diet has been around since the 1920s and is sometimes recommended for treating neurological disorders like epilepsy. While some people use the keto diet as a short-term solution to jumpstart weight loss, others adopt it as a permanent lifestyle. However, there are concerns about the potential health risks of long-term keto, including nutrient deficiencies, increased disease risk, and weight regain. Additionally, the strict guidelines of the keto diet can make it challenging to follow for extended periods. So, can you eat keto forever? The answer may vary depending on individual health needs and goals. While some people may find success with long-term keto, it's important to be aware of the potential risks and consider working with a healthcare provider to ensure a safe and sustainable approach to nutrition and weight management.
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What You'll Learn
Keto as a permanent lifestyle choice
The ketogenic (keto) diet is a popular low-carbohydrate, high-fat eating plan often used for weight loss. While some people use the keto diet as a short-term weight-loss tool, others adopt it as a permanent lifestyle choice.
There is no evidence that nutritional ketosis is harmful in the short or long term, and some people choose to remain on the keto diet indefinitely. The keto diet is an effective tool for health, whether used for a few months or as a permanent lifestyle choice. The elevated fat-burning, decreased appetite, and increased energy levels associated with keto can make it easier to maintain a healthy weight and improve overall health.
However, there are some potential risks and challenges associated with the keto diet as a long-term lifestyle choice. One of the main concerns is nutrient deficiency, as the diet restricts fruits, vegetables, and grains, which are rich sources of essential vitamins, minerals, and fibre. This can lead to issues such as disrupted gut microbiota, chronic constipation, and weakened immune function. Additionally, the high-fat nature of the diet, especially the high intake of saturated fats, has been linked to an increased risk of heart disease and "bad" LDL cholesterol. Furthermore, the strict guidelines of the keto diet can make it challenging to follow over an extended period, and there may be psychological impacts such as shame and binge eating due to the restrictive nature of the diet.
When considering the keto diet as a permanent lifestyle choice, it is essential to consult with a healthcare provider or nutritionist to ensure it is safe and suitable for your individual needs. While keto can provide health benefits, it may not be sustainable or necessary for everyone. Adopting a balanced approach to nutrition, such as the Mediterranean diet or intermittent fasting, can also be effective for long-term weight loss and maintaining a healthy weight.
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Nutritional deficiencies
The keto diet is associated with deficiencies in several micronutrients, including selenium, magnesium, phosphorus, and vitamins B and C. Folate (B9) and biotin (B7) deficiencies are also common on the keto diet. Folate is critical for life, as it is necessary for methylation, a process that keeps our cells functioning. Biotin deficiency can lead to symptoms such as thinning hair, dry skin, brittle nails, and fatigue.
Magnesium deficiency is also common on the keto diet, as it is found in foods such as fruits and grains, which are limited on keto. Symptoms of magnesium deficiency include muscle cramps, headaches, anxiety, nervousness, and constipation. Iron deficiency can also occur due to reduced absorption of iron caused by high amounts of fat in the diet. Iron is necessary for energy production and making red blood cells, and its deficiency can cause fatigue and trouble breathing during exercise.
To prevent nutritional deficiencies on the keto diet, it is important to include nutrient-dense foods such as colourful raw vegetables, grass-fed meat, poultry, wild-caught fish, and nuts and seeds. However, it can be challenging to persuade keto dieters to eat sufficient amounts of leafy greens, which are an important source of folate.
While the keto diet can be effective for weight loss in the short term, it is not a sustainable long-term solution. Most people regain at least half of the weight they lost once they stop the diet. Therefore, it is important to be cautious and consult a doctor or nutritionist before starting any restrictive diet like keto, and to prioritize sustainable dietary changes over time.
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Health risks
The ketogenic (keto) diet is a low-carbohydrate, high-fat eating plan often used for weight loss. While it can be healthy in the short term, healthcare providers generally do not recommend following the keto diet for more than 6-12 months. Staying on the keto diet long-term may lead to several health risks, including:
Nutrient deficiencies: Restricting carbohydrates and not eating a wide variety of fruits, vegetables, and grains can lead to deficiencies in micronutrients such as selenium, magnesium, phosphorus, and vitamins B and C. This can contribute to muscle cramps, fatigue, and weakened immune function.
Liver and kidney problems: The keto diet involves consuming a large amount of fat, which the liver must metabolize. This can overload the liver and kidneys, especially for those with pre-existing liver or kidney conditions.
Constipation and dehydration: The keto diet is low in fibrous foods like grains and legumes, which can lead to chronic constipation. It also eliminates glycogen, which holds water, from the bloodstream, leading to dehydration and a loss of electrolytes.
Heart health concerns: The high-fat nature of the keto diet can negatively impact heart health, especially if it involves consuming excessive amounts of saturated fats. This can increase cholesterol levels and the risk of heart attacks, strokes, and heart failure.
Blood vessel damage: When the body is in ketosis, it burns fat for energy instead of sugar. A sudden increase in glucose (sugar) can place stress on the blood vessels and cause inflammation.
Weight regain: While the keto diet can lead to rapid initial weight loss, this is often due to glycogen depletion and water loss. Long-term weight loss depends on sustained caloric deficits, and weight regain is common once the diet is stopped.
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Weight loss and weight gain
The keto diet is a high-fat, moderate-protein, and very-low-carbohydrate diet. It works by inducing ketosis, a metabolic process where the body uses fat storage for energy instead of glucose. To achieve ketosis, carbohydrates should represent only 5-10% of a person's calorie intake, which is about 20 to 50 grams of carbs per day. However, achieving and maintaining ketosis can be difficult. A person may feel like they have drastically reduced their carb intake, but they may still be consuming enough carbs for their body to produce energy from glucose, reducing the rate of fat burned.
Additionally, the restrictive nature of the keto diet can make it challenging to stick to in the long term. Many people may find it difficult to give up carb-rich foods entirely and may crave them, leading to a cycle of bingeing and guilt. The keto diet can also negatively impact your enjoyment of food and how you experience food-centric events, as it requires strict adherence without much room for flexibility. This restriction can lead to an unhealthy obsession with tracking every gram and macro, which may not be sustainable for everyone.
Furthermore, the keto diet may not provide all the essential nutrients the body needs, such as fiber, vitamins, and minerals, which can be found in fresh fruits, legumes, vegetables, and whole grains. A lack of these nutrients can impact overall health and well-being. While the keto diet may lead to initial weight loss, it is important to note that weight regain is common once the diet is stopped. This is because returning to previous dietary patterns can result in a rebound effect, causing the lost weight to quickly return.
To maintain weight loss after the keto diet, it is recommended to adopt some of the healthy behaviors learned during the diet, such as continuing to count carbs and gradually increasing carb intake from healthy sources. It is also important to focus on nutrient-dense, high-quality, and minimally processed foods, which are less likely to cause weight gain and promote a healthier relationship with food. Additionally, a balanced approach to eating, such as the Mediterranean diet, is recommended for long-term weight loss and overall health. While the keto diet may be effective for short-term weight loss, it may not be sustainable or healthy in the long term.
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Keto flu
The keto flu is a collection of symptoms experienced by some people when they first start a keto diet. These symptoms, which can feel similar to the flu, are caused by the body adapting to a new diet consisting of very few carbohydrates.
Symptoms of the keto flu include:
- Stomach aches or pains
- Nausea
- Dizziness
- Sugar cravings
- Cramping
- Muscle soreness and cramps
- Irritability
- Diarrhea or constipation
- Trouble falling asleep or staying asleep
- Poor focus and concentration
- Brain fog
- Fatigue
- Headaches
The keto flu can begin within the first few days of starting a keto diet and can last a week or less. In extreme cases, it can last up to a month. However, depending on your genetics, you may never experience the keto flu. Some people are naturally "metabolically flexible", meaning they can shift metabolic states easily without experiencing health symptoms.
To help prevent or reduce the symptoms of the keto flu, it is recommended that you:
- Drink plenty of water, as a keto diet can cause dehydration
- Eat more colourful vegetables
- Do not reduce your calorie intake too much, and try not to go low-carb and low-fat at the same time
- Increase your intake of healthy fats, such as avocado, bacon, and egg yolks
- Take an Epsom salt bath to soothe and relax your muscles and improve electrolyte absorption
- Drink herbal tea with calming herbs, such as chamomile, to promote better sleep
- Avoid caffeine, especially in the evening
- Exercise lightly, as strenuous exercise may worsen symptoms
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Frequently asked questions
The keto diet is a low-carb, high-fat diet that causes weight loss and provides numerous health benefits.
The keto diet has been shown to help with rapid weight loss and lower the risk of conditions like cancer, diabetes, and heart disease. The keto diet also helps treat neurological disorders like epilepsy, which causes frequent seizures.
Yes, there are some potential risks associated with the keto diet, including nutrient deficiencies, weight regain, and increased risk of heart disease due to high levels of saturated fat. Some people also experience negative side effects such as "keto flu," which can include symptoms like fatigue, constipation, and irritability.
There is no evidence that the keto diet is dangerous in the short term or long term. However, it can be challenging to follow due to its strict guidelines and potential side effects. Some healthcare providers recommend a balanced approach, like the Mediterranean diet, for long-term weight loss. Ultimately, the decision to stay on the keto diet long-term should be made in consultation with a healthcare professional.
There are several alternative diets that are also low-carb and high-fat, such as the Paleo, South Beach, and Atkins diets. Intermittent fasting is another approach that allows for a varied and balanced diet while still achieving the benefits of ketosis.
