The ketogenic (keto) diet is a high-fat, low-carb, and moderate-protein eating plan. It originated as a therapeutic diet for people with epilepsy but has become a popular way to lose weight. To stay in ketosis, the body's fat-burning state, a person can consume up to 50 grams of carbohydrates per day. This involves limiting or quitting sugar, which is a type of carbohydrate. Sugar cravings on the keto diet can be satisfied with keto-friendly alternatives, such as stevia, erythritol, and monk fruit sweeteners.
Characteristics | Values |
---|---|
Carbohydrates allowed per day | 20-50 grams |
Protein intake | 20-25% of calories from protein |
Fat intake | 60-75% of calories from fat |
Net carbs | Total carbs - fibre |
What You'll Learn
To stay in ketosis, a person can consume up to 50 grams of carbohydrates per day
On a keto diet, it is important to monitor your carbohydrate intake and choose foods with lower carb counts. This may include red meat, poultry, fish, natural fats, and above-ground vegetables. It is recommended to stay under 50 grams of net carbs (total carbs minus fibre) per day, and ideally below 20 grams. Net carbs are calculated by subtracting the amount of fibre from the total number of carbs. This is because fibre is not digested by the body and therefore does not impact blood sugar levels.
It is important to note that the number of carbs required to stay in ketosis may vary from person to person. Additionally, the type of keto diet being followed can also affect the amount of carbs allowed. For example, the standard ketogenic diet consists of 70% fat, 20% protein, and 10% carbs. In contrast, the cyclical ketogenic diet involves five low-carb days followed by two high-carb days.
While staying within the recommended carb limit, it is also crucial to ensure adequate protein intake. Most people need at least 70 grams of protein per day, or 20-35% of calories from protein. However, excessive protein intake can prevent the body from reaching ketosis. Therefore, it is important to find the right balance between carb and protein intake to maintain ketosis.
Overall, staying within the recommended carb range and monitoring protein intake are key factors in maintaining ketosis on a keto diet.
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The keto diet is a high-fat, moderate-protein, and very low-carb eating plan
The keto diet is designed to put your body into a state of ketosis, where it burns fat for fuel instead of carbohydrates. To achieve this, you need to limit your carbohydrate intake to around 20 to 50 grams per day. This includes not only sugary foods but also some fruits, vegetables, bread, beans, and legumes. It is important to read food labels and be mindful of hidden carbohydrates.
On the keto diet, you can eat high-fat foods such as butter, olive oil, nuts, cheese, and fatty cuts of meat. You can also have moderate amounts of protein, including chicken, turkey, fish, and eggs. However, it is important not to overdo it on protein, as excess protein can prevent ketosis.
While the keto diet does allow for some carbohydrates, it is crucial to avoid refined sugar and highly processed foods. These can trigger insulin and inflammation and hinder your progress. Instead, you can use alternative sweeteners like stevia, sucralose, erythritol, or monk fruit sweetener. These have minimal to no impact on blood sugar and insulin levels.
In addition to the types of food you eat, it is also important to consider your overall calorie intake. The keto diet can be effective for weight loss, but it is not a magic bullet. Long-term studies have shown that there may not be a significant difference in weight loss between keto and other diets. It is also important to be mindful of potential negative consequences, such as nutritional deficiencies, kidney stones, and adverse effects on heart health. Therefore, it is always recommended to consult a healthcare professional before starting any new diet.
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The keto diet may be beneficial for people with epilepsy
The keto diet can reduce the frequency of seizures in people with epilepsy. Clinical trials have shown that the keto diet typically reduces the number of seizures by 50% or more in half of patients with treatment-resistant epilepsy. The diet reduces the amount of glutamate in the brain and enhances the synthesis of GABA, making it less likely for a seizure to occur. It can also reduce inflammation in the brain, which can trigger seizures.
The keto diet has been shown to be particularly helpful for some epilepsy conditions, including infantile spasms, Rett syndrome, tuberous sclerosis complex, Dravet syndrome, Doose syndrome, and GLUT-1 deficiency. It is usually used in children with seizures that do not respond to medications, as it is stricter and more carefully measured than the modified Atkins diet. The modified Atkins diet is a less restrictive form of the keto diet, with a higher ratio of fat to protein and carbohydrates, and is often better suited to adults.
The keto diet can be challenging to maintain due to its restrictive nature, and it may cause side effects such as sluggishness, gastrointestinal symptoms, and elevated cholesterol levels. It is important for people with epilepsy to consult a doctor before starting the keto diet, as it may not be suitable for everyone.
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The keto diet may lead to nutritional deficiencies
The keto diet is a super-low-carb, moderate-protein, and high-fat diet that has helped people boost their energy levels, lose weight, and transform their lifestyles. However, it is a restrictive diet that can lead to nutritional deficiencies.
The keto diet restricts carbohydrates to an absolute minimum, which means that many plant-based foods are excluded. This can result in a gradual depletion of folate (B9), which is critical for life and keeps all of our cells functioning. Folate is also used to make DNA and red blood cells. A folate deficiency can lead to fatigue, weakness, headaches, irritability, difficulty concentrating, shortness of breath, and heart palpitations.
The keto diet can also lead to a vitamin B7 (biotin) deficiency. Biotin helps keep your skin, hair, eyes, liver, and nervous system healthy and is crucial during pregnancy. A biotin deficiency can cause hair loss, dermatitis, neuromuscular problems, lethargy, paresthesia in the extremities, reduced muscle tone, depression, hallucinations, and muscle pain.
In addition, the keto diet may cause a selenium deficiency. Selenium is a versatile and critical trace mineral that acts as an antioxidant, boosts immunity, ensures normal thyroid function, stimulates blood flow, and protects against heart disease.
Furthermore, the keto diet restricts protein, which can lead to a thiamin (B1) deficiency. Thiamin helps the body turn food into energy and is important for neurological health, heart health, and metabolism. A thiamin deficiency can lead to serious health problems such as beriberi and Wernicke-Korsakoff syndrome, which can cause visual impairments, lack of muscle coordination, and mental decline.
Finally, the keto diet may lead to a vitamin D deficiency, especially if an individual does not get enough sun exposure. Vitamin D is important for bone health and muscle contraction, nerve conduction, and other cellular functions. A vitamin D deficiency can cause rickets in children and osteomalacia in adults, as well as an increased risk of cancer and neurological disorders.
To avoid these nutritional deficiencies, it is important to include a variety of nutrient-dense foods in your diet, such as grass-fed and pastured meat, poultry, wild-caught fish, liver, spinach, kale, nuts, and seeds.
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The keto diet may cause the keto flu
The keto diet is a super-low-carb, moderate-protein, and high-fat diet that has helped boost the energy levels of its followers, as well as aiding weight loss and improving lifestyles. The diet typically allows for 50 grams or fewer of carbohydrates per day.
The keto diet may cause the so-called "keto flu", a collection of symptoms that can feel similar to the flu and are caused by the body adapting to a new diet of very few carbohydrates. The symptoms of keto flu may include headache, brain fog, fatigue, irritability, nausea, insomnia, and constipation. These symptoms are not unique to the keto diet; some people report similar symptoms after cutting back on processed foods or following an elimination or anti-inflammatory diet.
The keto flu is not an officially recognised medical condition, and its causes are not fully understood. It may be related to detox, carb withdrawal, an immunological reaction, or a change in the gut microbiome.
How to Ease Keto Flu Symptoms
- Drink plenty of water. The keto diet can cause dehydration, so it is important to replace lost fluids.
- Eat more often and include plenty of colourful vegetables.
- Don't give up on the diet too soon; you may feel exhausted for a few days, but your energy levels will likely return to normal within a week.
- If necessary, ease into the diet more slowly, rather than going "cold turkey".
- Avoid strenuous exercise until you are feeling better. Light activities like walking, yoga, or leisurely biking may help to improve symptoms.
- Replace electrolytes. The keto diet can cause a loss of electrolytes, so it is important to replace them. Salting your food to taste and eating potassium-rich, keto-friendly foods like leafy greens and avocados can help maintain a healthy balance of electrolytes.
- Get enough sleep. Lack of sleep can cause levels of the stress hormone cortisol to rise, which can negatively impact your mood and make keto-flu symptoms worse. Try reducing caffeine intake, cutting out ambient light in the bedroom, taking a bath, and getting up at the same time every day to normalise your sleep patterns.
- Eat enough fat (and carbs). Eating enough fat will help reduce cravings for restricted foods and keep you feeling satisfied. Gradually cutting back on carbs while increasing fat and protein in your diet may help to make the transition smoother and decrease keto-flu symptoms.
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Frequently asked questions
Generally, a person should consume up to 50 grams of carbs per day to stay in ketosis. However, the amount may vary slightly between individuals.
Net carbs refer to the total carbs minus fibre, as fibre is not digested by the human body. When following a keto diet, it is important to consider the number of net carbs in foods.
A keto diet typically includes foods that are high in fat and low in carbs. Meat, fish, poultry, eggs, and non-starchy vegetables are good options. It is best to avoid sugary and starchy foods, as well as highly processed foods.
Nuts, seeds, beef jerky, and non-starchy vegetables like broccoli and cucumbers are good keto-friendly snack options.
Some keto-friendly alternatives to sugar include stevia, sucralose, erythritol, xylitol, and monk fruit sweetener. These sweeteners have little to no impact on blood sugar and insulin levels.