The ketogenic diet is a high-fat, low-carb diet designed to put the body into a state called ketosis, where fat is burned as the primary fuel source instead of glucose. The time it takes to enter ketosis varies from person to person and depends on factors such as genes, muscle mass, insulin sensitivity, activity levels, and diet. On average, it takes about 2-4 days to enter ketosis, but it can take up to a week or longer. Once in ketosis, weight loss will probably slow down, but it will be more fat than water.
Characteristics | Values |
---|---|
Time to enter ketosis | 2-4 days, but can take up to a week or longer |
Factors affecting time to enter ketosis | Physical activity level, age, metabolism, diet (carb, fat, and protein intake) |
Weight loss | Immediate drop in water weight, then consistent fat loss |
Weight loss for athletic performance or cognitive benefits | A week to a couple of months |
Keto flu | Fatigue, mental fogginess, irritability |
What You'll Learn
How long does it take to enter ketosis?
Entering ketosis usually takes anywhere from two to four days on average, but it can take up to a week or longer for some people. The time it takes to enter this state depends on various factors, such as your age, metabolism, exercise level, and current carb, protein, and fat intake.
The ketogenic (keto) diet changes the way your body uses food. Typically, carbohydrates in your diet provide most of the fuel your body needs. The keto diet reduces the number of carbs you eat and teaches your body to burn fat for fuel instead. The keto diet is high in fat, moderate in protein, and low in carbohydrates.
When your body doesn't have enough carbs to burn for energy, it burns fat instead. As your body breaks down fat, it produces a compound called ketones. The ketones, or ketone bodies, become your body and brain's main source of energy.
How to enter ketosis
To enter ketosis, roughly 70–80% of daily calories should come from fat, less than 10% from protein, and only about 5% from carbohydrates or "carbs." Intermittent fasting before starting a keto diet can help speed up the process of getting into ketosis.
How to know if you're in ketosis
The easiest way to know if you're in ketosis is to test your body's ketone levels using a breath, urine, or blood ketone meter. As your body transitions into ketosis, you may also experience symptoms like headaches, fatigue, nausea, bad breath, and increased thirst, sometimes known as the keto flu.
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What are the benefits of keto oil?
The keto diet is a low-carb, high-fat diet that promises significant results. The diet aims to put your body into ketosis, where you burn fat as a primary fuel source instead of the glucose found in carbohydrates. To get to ketosis, you need to restrict your carb intake and deprive your body of glucose.
Keto-friendly cooking oils are a great way to ensure you get enough fat in your diet. All oils are pure fat and don't contain any carbs, but some are better than others. Here are some of the benefits of keto oils:
Avocado Oil
Avocado oil is a mild, versatile oil with a high smoke point, making it ideal for various cooking styles, including frying, grilling, roasting, sauteing, and searing. It is high in monounsaturated fats and antioxidants and contains vitamins A, E, and D, as well as proteins and potassium. Avocado oil enhances nutrient absorption and promotes better cholesterol levels. It has a rich, nutty flavor that complements sauteed and pan-fried foods. However, it is more expensive than some other oils.
Coconut Oil
Coconut oil is a unique plant-based oil made from coconut flesh. It has a relatively low smoke point, making it more suitable for baking and low-heat cooking. It has a distinct coconut taste, and consuming it has been linked to higher LDL (bad) cholesterol levels. However, refined coconut oil has a higher smoke point and is flavorless but is more processed.
Olive Oil
Olive oil is widely considered one of the healthiest oils available. Extra virgin olive oil is cold-pressed and unrefined, retaining much of the flavor and nutrients of the olives. It has a robust flavor with notes of fruity, buttery, and grassy tastes. However, it has a low smoke point, so it's not suitable for high-heat cooking.
Sesame Oil
Sesame oil is a seed oil with a rich, smooth flavor and a nutty aroma. It has a medium-high smoke point and is a good source of essential fatty acids. Using sesame oil in your cooking or adding it to sauces and dressings can help reduce blood pressure, eliminate belly fat, combat inflammation, and lower cholesterol levels.
Hazelnut Oil
Hazelnut oil is a flavorful, rich alternative to olive oil. It is high in essential fatty acids and adds a tasty layer to any dish. Hazelnut oil is great for keto-friendly baking, homemade pesto, marinades, salad dressings, or sauces.
Walnut Oil
Walnut oil, extracted from English walnuts, is full of omega-3 fatty acids, monounsaturated fats, and vitamins like manganese, niacin, potassium, and zinc. It has a rich, nutty flavor, making it a delicious addition to low-heat, light cooking keto recipes like grilled meats or desserts.
While these oils are great for the keto diet, it's important to remember that not all fats are created equal. It is recommended to eat moderate amounts of saturated fats and primarily polyunsaturated and monounsaturated fats.
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What foods can be eaten on the keto diet?
The ketogenic (keto) diet is a high-fat, very low-carbohydrate, and moderate-protein diet. It involves drastically reducing carbohydrate intake and replacing it with fat. This reduction in carbs puts your body into a metabolic state called ketosis, where your body uses fat instead of carbohydrates as its primary energy source.
Meat, Poultry, and Substitutes
Meat is a staple on the keto diet. You can have beef, pork, lamb, wild game, and poultry of all kinds. Soy products like tofu and tempeh also work. Deli meats like sausages and cold cuts are also keto-friendly, but they should be consumed in moderation as they are processed and may not be the best for your heart.
Fish and Shellfish
Most fish and shellfish are keto-friendly. Fatty fish such as salmon, sardines, mackerel, and herring are excellent choices, as are mild white fish such as cod, halibut, and trout.
Eggs
Eggs are delicious, portable, and vegetarian-friendly. They are high in protein, B vitamins, minerals, and antioxidants. Enjoy them boiled, fried, or in an omelet.
Vegetables
Enjoy unlimited non-starchy vegetables such as leafy greens, crunchy salad veggies (e.g. cucumber, celery, and radishes), cauliflower, cabbage, avocado, broccoli, and zucchini. Fresh or frozen, most vegetables that grow above ground are keto-friendly.
Fruits
Most fruits are off-limits on the keto diet due to their high carbohydrate content. However, small servings of tart fruits, such as berries, lemons, and limes are allowed. Melons are also keto-friendly due to their high water content.
Dairy
Cheese, butter, and cream can be part of a keto diet. Greek yogurt is a good option as it is protein-rich and has few carbs. Avoid flavored low-fat yogurt, which is often full of added sugar.
Nuts and Seeds
Most nuts and seeds are low in carbs and high in healthy fats, fiber, and protein. Good options include macadamias, almonds, pecans, walnuts, sesame seeds, pumpkin seeds, and flaxseeds.
Healthy Oils
Olive oil and coconut oil are the two oils recommended on the keto diet. Olive oil is associated with a lower risk of heart disease, while coconut oil contains medium-chain triglycerides (MCTs) that can increase ketone production.
Beverages
Unsweetened coffee and tea are keto-friendly. Dry wine, champagne, and hard liquor should be enjoyed sparingly. Water is always a good option, and you can add flavor with a slice of cucumber or a couple of berries.
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What are the drawbacks of the keto diet?
The keto diet has many drawbacks and potential negative side effects. Firstly, it is a very restrictive diet, which can be difficult to stick to. It requires a lot of fat to be consumed at each meal, which can be off-putting and impractical for some. The high-fat nature of the diet, particularly saturated fats, could have negative impacts on heart health, increasing the risk of heart disease.
The keto diet can also lead to nutrient deficiencies, as many fruits and vegetables are limited or eliminated. This can result in a lack of important vitamins and minerals, such as folate, thiamin, and vitamins A, B6, B12, C, E, and K. The diet can also cause constipation, due to the lack of fibre.
Other drawbacks include the risk of kidney stones, an increased risk of kidney disease, and liver problems. The keto diet can also cause dehydration, as it can result in water loss before fat loss.
The keto diet is not recommended for those with certain medical conditions, such as liver, kidney, or thyroid problems, or for women who are pregnant or trying to conceive. It can also cause "keto flu", which includes symptoms such as an upset stomach, dizziness, low energy, and mood swings.
The restrictive nature of the keto diet can also lead to social isolation and disordered eating. It is not a sustainable long-term solution, and weight is often regained when a normal diet is resumed.
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How do you know if you're in ketosis?
It can take anywhere from a few days to a week or more to enter ketosis, depending on your body and diet. Here are ten signs that you have reached ketosis:
Keto breath or bad breath
You may experience a fruity, acetone (like nail polish remover), or metallic smell on your breath. This is caused by the production of ketones, one of which is called acetoacetate.
Weight loss
You will likely experience rapid weight loss at first due to the diuretic effect of ketosis, resulting in a quick loss of water weight. As your body adapts to ketosis, you will begin to lose more body fat.
Fatigue
Fatigue is a common short-term side effect when entering ketosis, typically caused by dehydration. Ensure you stay hydrated and add a pinch of Himalayan salt to your water to balance your electrolytes.
Decreased energy for exercise
In the initial stages of ketosis, you may feel too fatigued to exercise. This is because your body is adjusting to using ketones as its fuel source instead of glucose. After a couple of weeks, your energy levels should return to normal or even increase.
Appetite suppression
Ketosis can lead to a reduction in the hormones that influence hunger and appetite, resulting in decreased hunger and increased satiety between meals. You may also experience fewer cravings for processed or sugary foods.
Improved cognitive performance
While you may experience some brain fog at the beginning of ketosis, your cognitive performance is likely to improve after a couple of weeks. Studies show that ketones enhance all areas of cognitive function, including mental clarity, focus, and concentration.
Digestive issues
When starting a high-fat diet, you may experience digestive issues such as diarrhea or constipation. This should improve as your body adjusts, but you can also take digestive enzymes to help with fat digestion during the transition.
Insomnia
In the initial stages of ketosis, you may experience trouble staying asleep. Studies show that you may have shorter stages of REM or "dream" sleep, but this should resolve within a couple of weeks.
Muscle cramping
Reducing your carbohydrate intake can lead to a decrease in insulin, causing your kidneys to release more sodium and disrupting your electrolyte balance. This can result in temporary muscle cramping. Adding a pinch of Himalayan salt to your water can help balance your electrolytes.
Increased ketones in the blood
The most accurate way to confirm ketosis is to test your blood ketone levels using a blood ketone meter. A blood ketone range of 0.5–3.0 mmol/L indicates ketosis, with 0.5 mmol/L being the minimum level required to maintain ketosis.
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Frequently asked questions
Results vary depending on your goals. If your goal is weight loss, you will see an immediate drop in water weight, and consistent fat loss as you progress. For athletic performance or cognitive benefits, it could take anywhere from a week to a couple of months to see results.
Keto oil is likely referring to MCT oil, which is a supplement often used by those on a ketogenic diet. MCT stands for medium-chain triglycerides, which are a form of saturated fatty acids that are more easily digested than other fats.
The ketogenic diet, or keto, is a high-fat, moderate-protein, low-carb diet. The goal of the keto diet is to put your body into a state of ketosis, where it burns fat as its primary fuel source instead of glucose from carbohydrates.
The keto diet can cause something known as the "keto flu", which includes symptoms such as fatigue, mental fogginess, and irritability. Other potential side effects include increased thirst, higher levels of "bad" cholesterol, and reduced blood sugar.