The keto diet is a low-carb, high-fat diet that can be effective for weight loss and certain health conditions. On a keto diet, you cut back significantly on carbohydrates to burn fat for fuel. This can put your body into a metabolic state called ketosis, where your liver turns fat into small energy molecules called ketones, which your brain and other organs can use for energy.
The number of carbs you can eat on a keto diet depends on your activity level, stress levels, sleep, and how adapted you are to keto. Generally, people on a keto diet consume only 20-50 grams of carbs per day, with the lower end of this range being better for ketosis. Some people on keto count net carbs, which allows them to get fiber from leafy greens and other low-carb veggies, while others count total carbs.
To stay in ketosis, it is important to consider the number of net carbs in foods. Net carbs can be calculated by subtracting the amount of fiber and half of the sugar alcohol content from the total number of carbs. Foods that are typically consumed on a keto diet include meat, poultry, fish, eggs, non-starchy vegetables, nuts, seeds, healthy oils, plain Greek yogurt, cottage cheese, unsweetened coffee and tea, and dark chocolate.
It is important to note that the keto diet is not suitable for everyone, and it is always recommended to consult with a healthcare professional before starting any new diet.
Characteristics | Values |
---|---|
Carbohydrate limit | 20-50 grams per day |
Net carbs | Total carbs - fibre and half the sugar alcohol content |
Total carbs | Depends on individual factors such as physical activity and stress levels |
Protein | 20-30% of calories |
What You'll Learn
- The keto diet is a low-carb, high-fat diet
- To stay in ketosis, a person can consume up to 50 grams of carbs per day
- The keto diet involves eating foods with high levels of fat and very low levels of carbohydrates
- The keto diet is not suitable for everyone
- The keto diet may have side effects, such as the keto flu
The keto diet is a low-carb, high-fat diet
To stay in ketosis, a person can consume up to 50 grams of carbohydrates per day. However, the fewer carbs you eat, the more effective the diet appears to be for reaching ketosis and losing weight. Some people on keto can tolerate fewer or more carbs, depending on personal factors such as physical activity and stress levels. If you're new to keto, you can start with an upper limit of 50 grams of carbs per day and gradually reduce your intake. This may help reduce the unpleasant symptoms of the "`keto flu," which can occur in the first few days of carb restriction.
On a keto diet, you should avoid sugary and starchy foods such as bread, cakes, cookies, sugar, most fruits and fruit juices, starchy vegetables, cereals, crackers, rice, pasta, and beer. Instead, focus on meat, poultry, fish, eggs, and other protein-rich foods. Include lots of leafy greens, non-starchy vegetables, and salads. Use fats like olive oil for flavor and to add calories if needed.
In addition to low carbs, the keto diet involves moderate amounts of protein. Excess protein can prevent ketosis. It's important to calculate your net carbs by subtracting the amount of fiber and half of the sugar alcohol content from the total number of carbs. This is especially important for people with diabetes, who may be at risk of hypoglycemia (low blood sugar).
Keto is generally safe, but there are potential side effects, and some people may need to take precautions. For example, those taking medication for high blood pressure or diabetes should speak to their doctor before starting a keto diet.
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To stay in ketosis, a person can consume up to 50 grams of carbs per day
On a keto diet, it is recommended to limit carb intake to 20-50 grams per day to reach and maintain ketosis. The lower the carb intake, the more effective the diet is for weight loss and improving type 2 diabetes. For those new to the keto diet, starting with an upper limit of 50 grams per day is recommended, as this can help reduce the unpleasant symptoms of the "keto flu," which can occur in the first few days of carb restriction.
It's important to note that the keto diet is not suitable for everyone. People with type 2 diabetes who are on insulin and those with type 1 diabetes should consult a doctor or dietitian before starting a keto diet. Additionally, older adults may find it challenging to sustain the keto diet due to the unpleasant keto flu symptoms.
To achieve and maintain ketosis, it is crucial to choose low-carb food options. Non-starchy vegetables like broccoli, cauliflower, green beans, bell peppers, zucchini, and spinach are good choices. Cheese, plain Greek yogurt, cottage cheese, eggs, nuts, seeds, and healthy oils are also keto-friendly. It is best to avoid starchy vegetables, high-sugar fruits, grains, sugar, margarine, and processed foods.
While on the keto diet, it is also important to monitor protein intake, as excessive protein consumption can prevent the body from reaching full ketosis. Staying hydrated and managing stress levels through regular exercise and meditation can also support ketosis.
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The keto diet involves eating foods with high levels of fat and very low levels of carbohydrates
The keto diet is a high-fat, low-carbohydrate diet that can be effective for weight loss and certain health conditions. On a keto diet, you cut back significantly on carbohydrates, which are the body's preferred source of energy, in order to burn fat for fuel. This reduction in carbohydrates puts the body into a metabolic state called ketosis, where the body starts breaking down stored fat into molecules called ketone bodies to use for energy.
To stay in ketosis, a person typically needs to consume only 20-50 grams of carbs per day, although this may vary depending on individual factors such as physical activity and stress levels. The lower your carb intake, the quicker your body enters ketosis. This means that 20 grams or fewer per day is better for achieving ketosis.
When following a keto diet, it is important to choose foods with the fewest carbs per serving. As a general rule, most vegetables that grow above the ground and fruits that are not very sweet are keto-friendly. Some examples of keto-friendly foods include:
- Meat, such as beef, pork, lamb, chicken, and turkey
- Fish, such as salmon, tuna, sole, trout, and halibut
- Natural fats, such as butter and olive oil
- Above-ground vegetables, such as leafy greens, broccoli, cauliflower, tomatoes, and eggplant
- Nuts and seeds
- Berries, such as strawberries, blueberries, and raspberries
- Dark chocolate (at least 70% cocoa)
On the other hand, foods that should be avoided on a keto diet include:
- Bread, tortillas, muffins, bagels, and pancakes
- Cakes, cookies, and other baked goods
- Sugar and anything made with sugar, including honey, syrup, and margarine
- Most fruits and fruit juice, especially bananas, raisins, dates, mangoes, and pears
- Starchy vegetables, such as corn, potatoes, sweet potatoes, and beets
- High-carb dairy products, such as milk and yogurt
- Beer and other alcoholic beverages with added sugar
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The keto diet is not suitable for everyone
The keto diet is a high-fat, low-carbohydrate, and moderate-protein diet. Carbohydrates are the body's preferred source of energy, but on a strict ketogenic diet, about 5% to 10% of energy intake is from carbohydrates. The reduction of carbohydrates puts the body into a metabolic state called ketosis, where the body starts breaking down stored fat into molecules called ketone bodies to use for energy.
While the keto diet can be beneficial for people with certain conditions, it is not suitable for everyone. Here are some reasons why:
Kidney Problems
High-fat animal foods, such as eggs, meat, and cheese, are staples of the keto diet because they don't contain carbohydrates. However, consuming large amounts of these foods can increase the risk of kidney stones. A high intake of animal foods can make the blood and urine more acidic, leading to increased calcium excretion in the urine. Additionally, the keto diet may overload the kidneys with protein, and people with chronic kidney disease should avoid this diet as it can worsen their condition.
Digestive Issues and Gut Health
The keto diet restricts carbohydrates, making it challenging to meet daily fiber needs. As a result, it can lead to digestive discomfort and constipation. The lack of fiber in the diet may also negatively affect gut bacteria, potentially impacting immunity, mental health, and inflammation.
Nutrient Deficiencies
The keto diet restricts several nutrient-dense foods, including fruits, whole grains, and legumes. As a result, it may not provide sufficient amounts of essential vitamins and minerals, such as calcium, vitamin D, magnesium, and phosphorus. Over time, this can lead to nutrient deficiencies.
Low Blood Sugar
Low-carb diets like keto can help manage blood sugar levels in people with diabetes. However, individuals with type 1 diabetes may be at a higher risk of hypoglycemic episodes, which can be life-threatening if not treated promptly. Even those with type 2 diabetes need to be cautious and monitor their blood sugar levels closely.
Bone Health
The keto diet has been associated with impaired bone health in several studies. It may lead to decreased bone strength and reduced bone mineral density. Therefore, it may not be suitable for individuals with bone ailments or those at risk for bone-related issues.
Heart Disease and Other Chronic Illnesses
The keto diet's long-term effects on heart health and the risk of chronic illnesses are not yet fully understood. However, some evidence suggests that high-fat, low-carb diets focusing on animal foods may lead to adverse health outcomes. Diets emphasizing vegetable sources of fats and proteins may provide more benefits in this regard.
Individual Responses
People's responses to the keto diet can vary. While some can sustain it for decades, others may not fare as well. It is essential to consult a healthcare professional before starting the keto diet, as it may not be suitable for everyone, especially those with eating disorders, heart disease risk, kidney disease, or pregnancy.
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The keto diet may have side effects, such as the keto flu
The keto diet is a high-fat, moderate-protein, and very low-carbohydrate diet. On a strict ketogenic diet, carbohydrates should make up about 5% to 10% of energy intake, with the reduction in carbs putting the body into a metabolic state called ketosis.
To stay in ketosis, a person should consume no more than 50 grams of carbs per day. However, some keto diets allow for a higher carb intake, such as the cyclical ketogenic diet, which includes five low-carb days and two high-carb days.
While the keto diet is considered safe for most people, it is associated with some unpleasant side effects, often referred to as the "keto flu" or "carb flu." This is a collection of symptoms experienced by some people when they first start the keto diet, as their body adapts to a new diet consisting of very few carbohydrates.
Symptoms of the keto flu include:
- Difficulty focusing ("brain fog")
- Headaches
- Fatigue
- Irritability
- Nausea
- Difficulty sleeping
- Constipation
- Diarrhea
- Muscle soreness
- Cravings
These symptoms can range from mild to severe and can last from a few days to several weeks.
- Increase your salt and water intake: Loss of salt and water is responsible for most keto flu issues, so increasing your intake can help reduce symptoms. Drink a glass of water with half a teaspoon of salt stirred into it, or opt for consommé, bouillon, bone broth, or chicken/beef stock.
- Eat more fat: Eating more fat will help reduce cravings and keep you feeling satisfied.
- Transition slowly: If you're still feeling unwell, you can slow down the transition to ketogenic eating by consuming slightly more carbs (20-50 grams per day).
- Avoid strenuous exercise: While light activities like walking or yoga may help improve symptoms, strenuous workouts should be avoided when experiencing keto flu.
- Get enough rest: Lack of sleep can negatively impact your mood and make keto-flu symptoms worse.
The keto flu is usually temporary, and most people will start feeling better within a few days to weeks. However, if you are feeling particularly unwell or your symptoms persist, it is best to consult your doctor.
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Frequently asked questions
On the keto diet, you should consume only 20-50 grams of carbs per day. The lower your carb intake, the quicker you will enter ketosis.
Ketosis is a metabolic state in which your body uses fat and ketones instead of glucose as its main fuel source.
Some common signs that you may be in ketosis include dry mouth, increased thirst and urination, and decreased appetite.
Choose foods with the fewest carbs per serving. As a general rule, most vegetables that grow above the ground and fruits that are not very sweet are keto-friendly.
Avoid bread, traditional sweeteners, starchy vegetables, and high-sugar fruits.