Dante Carrillo
The ketogenic (keto) diet is a low-carb, high-fat diet that causes weight loss and provides health benefits. The keto diet reduces the number of carbs eaten and teaches the body to burn fat for fuel. While the keto diet does not restrict eating times, it is important to note that it may cause insomnia and other symptoms of 'keto flu', such as an upset stomach, headache, and fatigue. To combat insomnia, it is recommended to avoid eating three to four hours before bedtime and to gradually decrease carb intake instead of making sudden changes. Additionally, the time of day when carbs are consumed does not significantly impact ketosis, as long as the daily carbohydrate threshold is not exceeded. Intermittent fasting, which involves eating within an eight-hour window and fasting for the remaining 16 hours, may help achieve ketosis faster. The keto diet has several versions, including the standard ketogenic diet (SKD), cyclical ketogenic diet (CKD), targeted ketogenic diet (TKD), and high protein ketogenic diet.
| Characteristics | Values |
|---|---|
| Carbohydrates | Carbohydrates are restricted on the keto diet. Bread, cereal, grains, fruits, and starchy vegetables are high in carbohydrates and should be avoided or limited. |
| Fats | The keto diet is high in fat. Sources of fat include meat, fish, nuts, seeds, butter, cream, and oils such as olive oil. |
| Proteins | The keto diet is moderate in protein. Cheese, eggs, and nuts are good sources of protein on the keto diet. |
| Timing of Meals | There is flexibility in when meals are consumed on the keto diet. Intermittent fasting can be combined with keto, but it is not necessary. Eating late at night may disrupt sleep for some people, but it is not inherently harmful. |
| Benefits | The keto diet may aid weight loss, increase energy and focus, and reduce the risk of metabolic syndrome and associated heart disease. |
| Side Effects | Side effects of the keto diet may include "keto flu," upset stomach, headache, fatigue, bad breath, constipation, dehydration, low bone density, high cholesterol, and kidney stones. |
| Individual Variation | The keto diet may be challenging to maintain long-term, and the long-term effects are not well understood. Working with a dietitian is recommended to ensure adequate nutrient intake and maintain ketosis. |
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What You'll Learn
Keto diet basics: low-carb, high-fat, moderate protein
The keto diet is a low-carb, high-fat, and moderate-protein diet that has been used to treat specific medical conditions and promote weight loss. The standard keto diet consists of 70% to 80% fats, 10% to 20% proteins, and 5% to 10% carbohydrates. This means limiting carb consumption to around 20 to 50 grams per day and filling up on healthy fats and protein-rich foods.
When following a keto diet, it is important to base your meals on meat, poultry, fish, eggs, and other protein-rich foods. Include plenty of leafy greens, non-starchy vegetables, and healthy fats like olive oil, nuts, seeds, butter, and cheese. Avoid sugary and starchy foods, and limit your fruit intake due to its high carbohydrate content.
The keto diet works by changing the way your body uses food. Typically, carbohydrates in your diet provide most of the fuel your body needs. The keto diet reduces your carb intake and teaches your body to burn fat for fuel instead. This state of burning fat for fuel is called ketosis, and it can have several health benefits in addition to weight loss.
Ketosis may help reduce your risk of metabolic syndrome, which is associated with a lower risk of heart disease. It has also been shown to increase energy and focus, as the brain may work more efficiently on ketones than on glucose. However, there may be some side effects to the keto diet, such as "keto flu," which includes symptoms like an upset stomach, headache, and fatigue.
While the keto diet does not restrict eating to specific hours, intermittent fasting is often used in conjunction with keto to help achieve ketosis faster. Intermittent fasting involves eating all your meals within an 8-hour window and fasting for the remaining 16 hours of the day. This method can help you reach ketosis more quickly and may offer additional health benefits.
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Keto-friendly foods: meats, fish, eggs, nuts, cheese, etc
The ketogenic diet is a low-carb, high-fat diet that causes weight loss and provides numerous health benefits. There are several versions of the keto diet, but the standard ketogenic diet (SKD) is a very low-carb, moderate-protein, and high-fat diet, typically containing 70% fat, 20% protein, and only 10% carbs.
Meat is a staple of the keto diet, and the most keto-friendly meats come from grass-fed and pasture-raised animals, as they contain higher-quality fats. Chicken, beef, pork, fish, and seafood are all very low-carb and great sources of protein. Lamb chops, steak, and ribeye steak are also keto-friendly, as they are higher in fat. When choosing a cut of meat, look for those with more fat and marbling to maintain a high-fat, low-carb diet.
Fish and seafood are also excellent choices for the keto diet, as they are naturally high in protein and contain omega-3 fatty acids. Salmon, tuna, shrimp, bay scallops, and mahi-mahi are all keto-friendly options. Mahi-mahi, in particular, is a delicious white fish with a mild, sweet flavor that can be grilled, baked, or pan-fried.
Eggs are another great source of protein for the keto diet. They can be prepared in a variety of ways and are a staple of breakfast, such as a Cobb salad with hard-boiled eggs, or an omelet.
Nuts are a great addition to the keto diet, as they are high in healthy fats and low in carbohydrates. Almonds, macadamia nuts, pecans, and Brazil nuts are all keto-friendly options. These nuts are also rich in protein, vitamins, minerals, fiber, and antioxidants.
Cheese is also a keto-friendly food and can be added to many meals. It can be enjoyed as a snack, such as cubed cheese with nuts, or as a dessert, such as a mixed cheese board. It can also be added to meals, such as extra cheese on a bun-less burger or with meat and vegetables at a Mexican restaurant.
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Intermittent fasting: a possible route to ketosis
Intermittent fasting is a popular dieting trend that involves limiting when you eat, rather than what you eat. It is based on the idea that our metabolisms have adapted to function best with periods of hunger and eating during the day, and sleeping at night.
Intermittent fasting can be an effective way to reach ketosis. Ketosis is a metabolic state where the body uses fat as its main fuel source, instead of glucose. Typically, the body breaks down carbohydrates into glucose to use as fuel. However, when the body does not have enough glucose available, it starts breaking down stored fat instead, producing ketones, which can be used as an alternative energy source.
Intermittent fasting can trigger ketosis by creating a period of time in which no calories are consumed. The most common method of intermittent fasting involves eating all your food within an eight-hour window, and then fasting for the remaining 16 hours of a 24-hour period. During this 16-hour fast, the body may enter a state of ketosis, using fat as its primary fuel source.
Combining the keto diet with intermittent fasting can be an effective way to promote ketosis. The keto diet is a low-carb, high-fat, moderate-protein diet that also triggers ketosis by reducing the body's glucose supply. By following a keto diet during the eating periods of intermittent fasting, you can further encourage your body to use fat as fuel, potentially enhancing fat loss.
It is important to note that ketosis can be challenging to achieve and may not be safe or comfortable for everyone. Before starting any new diet, it is recommended to consult a healthcare professional.
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Keto insomnia: sleep issues and the keto diet
The keto diet is a low-carb, high-fat diet that causes weight loss and provides numerous health benefits. It changes the way your body uses food, reducing the number of carbs you eat and teaching your body to burn fat for fuel instead. Typically, carbohydrates in your diet provide most of the fuel your body needs. However, when your carb intake is very low, your body burns fat instead, producing a compound called ketones, which become your body and brain's main energy source.
The keto diet may cause insomnia, or keto insomnia, as one of the signs that your body is shifting into ketosis, along with other symptoms of "keto flu" such as an upset stomach, headache, fatigue, bad breath, constipation, dehydration, and low bone density. While keto insomnia usually goes away after a few days or weeks of low-carb eating, there are some strategies that may help if you are affected. Firstly, try to avoid eating for three to four hours before bedtime. This can be particularly helpful if you feel especially energetic on a keto diet, which may also be due to exercising in the evening. If this is the case, try exercising earlier in the day and see if your sleep patterns improve.
Another strategy to combat keto insomnia is to eat the majority of your daily carbs in the 3-4 hours before bed. Eating carbs causes stress hormones like cortisol to decrease and promotes the production of serotonin, a feel-good hormone involved in restorative sleep. However, this strategy contradicts the fundamental principle of the keto diet, which is to minimize carb consumption.
It is important to note that there are no studies proving that eating before bed directly causes any physiological issues. However, for some people, it can exacerbate another medical condition or lead to disrupted sleep. For example, people with gastroesophageal reflux disease (GERD) should avoid eating before bed, especially in large amounts, and should eat their last meal of the day around three hours before sleeping. Additionally, eating before bed can lead to unhealthy habits, such as excessive snacking while relaxing in front of the TV.
If you are experiencing insomnia due to the keto diet, you may want to try implementing the diet more gradually. For example, if you plan to eat 25 grams of carbs a day on keto, try reducing your intake to 50 grams for a few days, and then gradually decrease your carb intake until you reach your long-term macros.
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Health benefits and risks: weight loss, energy, and more
The keto diet has been associated with several health benefits, including weight loss, increased energy, and the treatment of chronic illnesses.
When on a keto diet, the body enters a metabolic state called ketosis, where it burns fat instead of glucose for energy. This process can lead to weight loss, as the body breaks down fats into molecules called ketones, which serve as an alternative fuel source. Many people report rapid initial weight loss on the keto diet, but long-term fat loss depends on maintaining a calorie deficit. The keto diet may also help reduce hunger and lower cravings, making it easier to stick to the diet and maintain weight loss.
In addition to weight loss, the keto diet has been linked to increased energy levels and improved focus. This is because ketones provide a more efficient fuel source for the brain and body. The keto diet may also be beneficial for treating and managing certain chronic illnesses, including epilepsy, Alzheimer's disease, autism, and type 2 diabetes. It may also reduce the risk of developing metabolic syndrome and cardiovascular disease by lowering blood pressure and improving cholesterol levels.
However, the keto diet also has some potential risks and side effects. It can be challenging to follow due to its stringent food restrictions, and it may cause side effects such as "keto breath," constipation, upset stomach, headache, and fatigue ("keto flu"). Some experts also express concern about the high amounts of meat and eggs typically included in keto diets, which may have negative effects on heart health.
For long-term weight loss and overall health, some experts recommend a more balanced approach, such as the Mediterranean diet, or intermittent fasting, which allows for a varied and nutrient-dense diet while still providing the benefits of ketosis. Making small, gradual changes based on individual health goals can be a more sustainable approach to weight loss and maintaining a healthy weight.
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Frequently asked questions
The keto diet is a low-carb, moderate protein, and high-fat diet that causes weight loss and provides health benefits. The standard keto diet consists of 70% to 80% fats, 10% to 20% proteins, and 5% to 10% carbohydrates.
The keto diet includes foods such as meats, fish, nuts and seeds, butter and cream, oils such as olive oil, cheese, and non-starchy vegetables like broccoli, cauliflower, green beans, bell peppers, zucchini, and spinach.
While there is no evidence that eating before bed causes any physiological harm, it may disrupt sleep for some people. On keto, you should generally minimize carbs, but the time of day you consume them does not impact ketosis. However, eating carbs in the evening may promote better sleep.
The keto diet has been shown to increase focus and energy, reduce inflammation, and lower the risk of metabolic syndrome, which is associated with heart disease. Ketosis may also aid in weight loss and treat or manage diseases like epilepsy.
Some people may experience "keto flu" symptoms such as an upset stomach, headache, fatigue, bad breath, constipation, dehydration, or insomnia. Long-term effects on overall health are not well understood, and the diet may be challenging to maintain.
