The keto diet is a low-carbohydrate method of eating that puts the body into a state of ketosis. To stay in ketosis, a person needs to consume no more than 50 grams of carbohydrates per day. This can be challenging as it is a very restrictive diet, but there are still plenty of food options available.
For example, vegetables that grow above the ground and fruits that are not very sweet are usually keto-friendly. Meat, fish, cheese, olive oil, coconut fat, butter, and eggs are also good options as they have almost no carbs.
On the other hand, wheat-based products such as rice, pasta, and cereals are high in carbs and should be limited. Bread is also never a recommended part of a keto diet as it is challenging to eat it and stay below the daily carb limit.
Characteristics | Values |
---|---|
Carb limit for keto diet | 20-50 grams of carbs per day |
Who is the keto diet for? | People wanting to get into ketosis |
Who is the keto diet not suitable for? | People with diabetes |
High-carb foods to avoid | Bread, rice, pasta, potatoes, lentils, cashews |
Low-carb foods to eat | Broccoli, raspberries, Brazil nuts, zucchini, red peppers, walnuts, blueberries, strawberries, almonds, meat, fish, olive oil, coconut fat, butter, eggs, avocado, cheese |
What You'll Learn
Vegetables, fruits, meat, fish, cheese, eggs, and nuts are keto-friendly foods
Vegetables
Vegetables that are allowed on the keto diet include:
- Celery
- Zucchini
- Mushrooms
- Romaine lettuce
- Radishes
- Cucumber
- Spinach
- Arugula
- Asparagus
- Tomatoes
- Kale
- Bell peppers
- Cauliflower
- Eggplant
- Broccoli
- Cabbage
- Green beans
- Brussels sprouts
Fruits
Fruits that are allowed on the keto diet include:
- Avocados
- Watermelon
- Strawberries
- Lemons
- Tomatoes
- Raspberries
- Peaches
- Cantaloupe
- Star fruit
- Blackberries
Meat
Meat is considered a staple food on the keto diet. Fresh meat and poultry contain no carbs and are rich in B vitamins and minerals. Meat is also a great source of high-quality protein, which may help preserve muscle mass during a very low-carb diet.
Fish
Fish and shellfish are very keto-friendly. Salmon and other fish are not only nearly carb-free but also rich in B vitamins, potassium, and selenium.
Cheese
Most types of cheese are very low in carbs and high in fat, making them a great fit for the keto diet. Cheeses that are keto-friendly include:
- Parmesan
- Mascarpone
- Gouda
- Cheddar
- Swiss cheese
- Gruyère
- Cheddar
Eggs
Eggs are an extremely healthy source of protein. Each large egg contains less than 1 gram of carbs and about 6 grams of protein, making them ideal for keto.
Nuts
Nuts are a great addition to a keto diet as they are high in healthy fats and low in carbohydrates. Nuts that are keto-friendly include:
- Almonds
- Macadamia nuts
- Pecans
- Brazil nuts
- Walnuts
- Hazelnuts
- Pine nuts
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A keto diet is a low-carb, high-fat diet
On a keto diet, you cut back significantly on carbohydrates so that your body burns fat for fuel. This puts your body into a metabolic state called ketosis, where the liver turns fat into small energy molecules called ketones, which the brain and other organs can use for energy.
The keto diet is generally safe, but it is not suitable for everyone. For example, breastfeeding women and people with certain metabolic conditions should avoid it. It is also not recommended for people with rare metabolic conditions that are usually diagnosed in childhood.
The keto diet is particularly useful for losing excess body fat without hunger and for improving type 2 diabetes or metabolic syndrome. It may also help treat refractory epilepsy and has shown promising results in impairing the growth of certain types of cancer.
- Meat: red meat, such as beef, pork, and lamb; poultry, such as chicken and turkey; fish of all types.
- Natural fats, such as butter and olive oil.
- Above-ground vegetables, including leafy greens, broccoli, cauliflower, tomatoes, and eggplant.
- Cheese: for example, 100 grams of cheddar cheese has 2.44 grams of carbs and 34 grams of fat.
- Dark green vegetables, such as broccoli, are low in carbs and rich in magnesium, protein, vitamin C, and antioxidants.
- Berries (strawberries, blueberries, raspberries) in small to moderate amounts.
- Wheat-based products, such as bread, tortillas, muffins, bagels, pancakes, cakes, cookies, and other baked goods.
- Sugar and anything made with sugar.
- Most fruits and fruit juices.
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A keto diet may help with weight loss
The keto diet is a low-carb, high-fat eating plan that has been used for centuries to treat specific medical conditions. It has gained attention as a potential weight-loss strategy due to the low-carb diet craze. The premise of the keto diet for weight loss is that depriving the body of glucose – its main source of energy – will lead to the production of an alternative fuel called ketones, which are derived from stored fat. This state is known as ketosis.
The keto diet typically limits total carbohydrate intake to less than 50 grams per day, with some sources suggesting a limit as low as 20 grams. This forces the body to burn fat for energy instead of carbs, causing a drop in glucose levels and an increase in ketones.
The keto diet emphasises the consumption of high-fat foods, including:
- Fatty meats, such as bacon and fatty cuts of beef
- Poultry
- Pork
- Fish
- Eggs
- Cheese
- Nuts
- Avocados
- Oils
- Butter
- Seeds
- Dark chocolate (at least 70% cocoa)
The keto diet bans carb-rich foods, including:
- Breads
- Cereals
- Pasta
- Rice
- Cookies
- Potatoes
- Corn
- Starchy vegetables
- Fruit juices
- Beans
- Legumes
- Most fruits
Weight Loss Benefits
There is evidence that the keto diet can help with weight loss. It may help you lose fat, preserve muscle mass, and improve markers of disease. Some studies suggest that the keto diet may be more effective for weight loss than a low-fat diet, even when total calorie intake is matched.
The keto diet may also lead to reductions in appetite and food intake. This is because the diet increases protein intake, which has weight loss benefits, and can act as an appetite suppressant by positively affecting hunger hormones such as leptin and ghrelin.
Additionally, the keto diet can improve insulin sensitivity, which can help improve fuel utilisation and metabolism. This can lead to decreased fat storage and increased fat burning, as excess carbs are stored as fat, while a minimal intake of carbs forces the body to use fat for energy.
Considerations
While the keto diet may be an effective weight loss strategy, there are some considerations to keep in mind. Firstly, it can be challenging to maintain a very high-fat diet, and extreme carbohydrate restriction may lead to unpleasant symptoms such as hunger, fatigue, low mood, irritability, constipation, headaches, and brain fog.
Secondly, there may be negative side effects of a long-term keto diet, including an increased risk of kidney stones, osteoporosis, and high blood levels of uric acid (a risk factor for gout). It is also important to ensure you are meeting your calorie needs while on the keto diet, as cutting calories too much can slow your metabolism and make weight loss more difficult in the long run.
Finally, the keto diet may not be suitable for everyone. It is not recommended for individuals with disorders of fat metabolism, carnitine deficiency, or pyruvate kinase deficiency. Additionally, it may be challenging for vegetarians or vegans to follow due to the key role that meats, eggs, fish, and dairy play.
The keto diet may be a successful weight loss strategy for some individuals, particularly those who are obese or at risk of developing metabolic syndrome. However, it is important to consult with a healthcare professional before starting the keto diet to ensure it is safe and suitable for you.
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A keto diet may help manage type 2 diabetes
The keto diet may help manage type 2 diabetes by improving blood glucose (sugar) levels and reducing the need for insulin. The diet can also lead to weight loss, which is beneficial for people with diabetes and high blood sugar levels.
However, there are some risks and drawbacks associated with the keto diet. It can be challenging to sustain because it is very restrictive, and it may cause side effects. Additionally, a high-fat diet may seem unhelpful for people with type 2 diabetes who are often overweight.
It is important to consult a doctor before starting the keto diet, especially for people with diabetes, as there may be a risk of low blood sugar (hypoglycemia) if medication dosages are not adjusted accordingly. Regular health monitoring is also recommended to check for any negative effects on the heart and to ensure blood sugar levels remain within a safe range.
The keto diet is not the only dietary approach to managing type 2 diabetes. Other diets that have been found to be effective include the Mediterranean diet, plant-based diets, and low-fat diets. Ultimately, the best diet for managing type 2 diabetes may depend on individual needs and preferences.
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A keto diet may cause side effects like lightheadedness, fatigue, and headaches
The keto diet is a low-carbohydrate method of eating that aims to put the body into a state of ketosis, where fat is burned as the primary source of energy instead of carbohydrates. While this diet can be effective for weight loss, it often comes with several side effects, including lightheadedness, fatigue, and headaches.
Lightheadedness and dizziness are often caused by dehydration, a common side effect of the keto diet. As the body shifts into ketosis, it depletes its stored form of carbohydrates, called glycogen, which is bound to water molecules. This leads to increased urination and subsequent dehydration. Additionally, the body produces less insulin on a keto diet, which can affect electrolytes and further contribute to dehydration.
Fatigue is another common side effect, especially during the initial stages of the keto diet. This occurs as the body transitions from burning carbohydrates to burning fat for energy. Carbohydrates provide a quicker burst of energy, so the switch to burning fat can result in feelings of tiredness and weakness. This fatigue typically lasts for a few weeks until the body adapts to the new energy source.
Headaches are among the most common side effects of the keto diet and are usually triggered by dehydration or low blood sugar levels. The keto diet drastically reduces carbohydrate intake, which can lead to a drop in blood sugar as the body begins relying on ketone bodies instead of glucose. This transition into ketosis can stress the brain, resulting in mental fatigue, brain fog, and headaches.
To minimize these side effects, it is crucial to ensure proper hydration by drinking plenty of water and consuming water-rich, electrolyte-rich foods. Increasing salt intake can also help reduce the risk of dehydration and associated lightheadedness. Additionally, eating enough protein and fat is essential to prevent fatigue, as a diet low in both can lead to increased hunger and tiredness.
While the keto diet may cause some unpleasant side effects, these symptoms often disappear within a few days or weeks as the body adapts to burning fat for fuel. Staying adequately hydrated, consuming enough electrolytes, and ensuring proper nutrition can help alleviate and prevent these side effects.
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Frequently asked questions
The keto diet is a low-carbohydrate method of eating that puts the body into a state of ketosis. This means the body burns fat instead of carbohydrates for energy.
To stay in ketosis, a person can consume up to 50 grams of carbs per day. However, some people may need to stay under 20 grams to remain in ketosis.
50 grams of net carbs can be made up of low-carb foods like vegetables, nuts, and berries. This could be four cups of cherry tomatoes, two large zucchini, and three large red peppers.
Some foods that are typically high in carbs, like bread, potatoes, pasta, and rice, will quickly take you over your daily carb limit and out of ketosis. It is recommended to replace these foods with low-carb alternatives.