Intermittent fasting and keto are two of the most popular health and weight loss trends. Intermittent fasting is an eating pattern that involves rotating between periods of fasting and normal eating. The keto diet, on the other hand, is a high-fat, very low-carb way of eating. Both diets are restrictive and can be challenging to follow, but some people choose to combine them. Proponents of this approach argue that it may help the body reach a state of ketosis faster, which may lead to additional weight loss. However, there is a lack of rigorous research on the combined approach, and it may not be suitable for everyone.
Characteristics | Values |
---|---|
Goal | Weight loss |
Benefits | Improved blood sugar control and insulin sensitivity, decreased body fat percentage and better body composition, enhanced mental clarity, may boost overall fitness results, simplifies keto meal plan and makes weight loss easier to maintain |
Downsides | Requires commitment, may be too restrictive, may be uncomfortable, may cause side effects such as nausea and constipation |
Who should try it? | People looking to lose weight quickly, people with type 2 diabetes, people with prediabetes |
Who should avoid it? | Pregnant or breastfeeding women, people with a history of disordered eating, people with type 1 diabetes, people with certain health conditions |
What You'll Learn
Weight loss
Intermittent fasting and the keto diet are two of the most popular health trends. While both methods have solid research backing their purported benefits, it is unclear whether combining the two is safe and effective.
Intermittent Fasting
Intermittent fasting is an eating method that cycles between calorie restriction, or fasting, and normal food consumption during a specific time period. There are several types of intermittent fasting routines, including the 5:2 method, the Warrior Diet, and alternate-day fasting. The most popular method is the 16/8 method, which involves eating during an eight-hour time frame and then fasting for 16 hours. Intermittent fasting is mainly used as a weight-loss technique, but it also has other health benefits, such as reducing inflammation and improving brain function and blood sugar control.
The Keto Diet
The ketogenic (keto) diet is a high-fat, very low-carb way of eating. Carbohydrates are typically reduced to 20 to 50 grams per day, which forces the body to rely on fats instead of glucose for energy. This metabolic process is called ketosis, where the body breaks down fats to form substances called ketones, which are used as an alternative fuel source. The keto diet is an effective way to lose weight, but it also has other benefits, such as improved blood sugar control and lower heart disease risk factors.
Combining Intermittent Fasting and Keto
Combining intermittent fasting with the keto diet may help with weight loss by helping the body reach ketosis faster and burning more fat. This is because intermittent fasting boosts metabolism and promotes thermogenesis, or heat production, which can lead to the utilisation of stubborn fat stores. Additionally, intermittent fasting can reduce hunger and promote feelings of fullness, which can aid in weight loss. However, there is a lack of rigorous research on this combined approach, and it has not been proven to work for weight loss.
Furthermore, combining these two diets can be extremely restrictive, making it challenging to stick to the low-carb count and confined eating window. It is also important to note that this combination may not be suitable for everyone, especially those with a history of disordered eating, diabetes, heart disease, or other health conditions. Therefore, it is recommended to consult a healthcare professional before starting any new diet, especially when combining two restrictive diets like intermittent fasting and keto.
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Ketosis
When the body is in a state of ketosis, it has run out of glucose (its preferred energy source) and starts burning stored fat. Ketosis can be triggered after just 12 hours of not eating, which many people do overnight before they "break fast" with a morning meal. A keto diet keeps you in ketosis for much longer time periods because you avoid carbohydrates, which supply glucose. Instead, fat becomes the preferred fuel source.
Intermittent fasting can be an effective way to enter ketosis more quickly. This is because your body, when fasting, maintains its energy balance by shifting its fuel source from carbs to fats. During fasting, insulin levels and glycogen stores decrease, leading your body to naturally start burning fat for fuel.
There are several different intermittent fasting methods, including the 5:2 method, the Warrior Diet, and alternate-day fasting. The most popular kind of intermittent fasting is the 16/8 method, which involves eating during an eight-hour timeframe before fasting for 16.
Keto coffee fasting is an excellent intermittent fasting method for keto beginners. This involves drinking Bulletproof or Ketoproof coffee as a breakfast replacement, helping to extend your fasting window.
Combining keto and intermittent fasting can be a powerful way to lose weight and improve overall health. However, it is a very restrictive approach and may not be suitable for everyone. It is always best to consult a healthcare professional before starting any new diet.
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Health benefits
Intermittent fasting and keto are two of the most popular health trends. While both have solid research backing up their purported benefits, it is important to note that there is a lack of rigorous research on the combined approach. Here are some health benefits of combining the two:
- Weight Loss: Intermittent fasting and keto are both effective ways to lose weight. Combining the two can lead to greater weight loss than either method alone. Intermittent fasting boosts metabolism and promotes thermogenesis, or heat production, which can help burn more fat.
- Ketosis: Intermittent fasting can help the body reach ketosis quicker than the keto diet alone. During fasting, the body's fuel source shifts from carbs to fats, which is the basis of the keto diet.
- Improved Blood Sugar Control: Intermittent fasting lowers insulin levels and helps control blood sugar. This can be beneficial for people with prediabetes or type 2 diabetes.
- Reduced Inflammation: Intermittent fasting has been shown to reduce inflammation in the body, which can be helpful for managing inflammation-related health conditions like arthritis and asthma.
- Improved Brain Function: Intermittent fasting can improve mental clarity and brain health. Ketosis provides the brain with a consistent fuel source, resulting in better mental performance.
- Disease Risk Reduction: Intermittent fasting triggers a process called autophagy, which protects against oxidative stress and may help defend against Alzheimer's disease and kill cancer cells.
- Cardiovascular Health: Fasting is linked to improved heart health markers, including lowered cholesterol and blood pressure.
- Convenience: Intermittent fasting cuts down on meal planning, preparation, and cleanup time. It also reduces decision fatigue over what to eat.
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Autophagy
The process of autophagy can be beneficial for several reasons. Firstly, it prompts the regeneration of healthy cells and provides energy and building blocks for cells that can still be repaired. Secondly, it recycles residual proteins and removes toxic proteins from cells, which is particularly important for those with Parkinson's and Alzheimer's disease. Thirdly, it can reduce the effects of aging, providing numerous skin benefits and leaving you looking younger and healthier.
Intermittent fasting and keto diets can increase the likelihood of inducing autophagy. Combining the two approaches may be beneficial for weight loss and improving health, as they both encourage the body into a ketogenic state and increase fat burning. However, there is a lack of rigorous research on the combined approach, and it is important to note that this method may not work for everyone. It is always recommended to consult a healthcare professional before starting any new diet.
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Meal timing
Intermittent fasting is a way of eating that revolves around timing your food intake to improve overall health and boost long-term weight loss results. It involves restricting your food consumption to a specific window of time. For example, one of the most common intermittent fasting approaches is fasting during an 18-hour window of time and eating during the 6-hour window of time that is left in the day.
There are several different ways to schedule your fasting times. The 16:8 version (fasting for 16 hours, eating for eight hours) is the most commonly used. For people who are newer to IF, the 14:10 schedule might be easier to stick to, because you have a 10-hour eating window and only a 14-hour fast.
Another popular schedule is the 5:2 method, which involves eating as you would normally for five days out of the week and cutting back your food intake to about 500 calories two days of the week. It's a similar concept to alternate-day fasting: fasting every other day by consuming little to no calories, and eating as you regularly would for the remainder of the days.
The most common eating window regimen is the 16/8 schedule. This means that you’ll condense your entire macronutrient intake within an 8-hour eating window. For the remaining 16 hours, you’ll be in a fasted state (i.e., consuming no calories whatsoever). As the body adapts, many keto dieters will extend their fasting window and reduce their eating window.
Typically, people restrict themselves to an 8-hour eating window between 1 and 9 pm or 12 and 8 pm. Once you have the hang of eating on a schedule, you can try more prolonged periods of 18-24-hour fasting.
If you’re struggling with skipping breakfast, give the keto coffee fast a try. This can help boost your ketone levels and reduce your appetite naturally. Whether you decide to do it every day, once a week, or twice a week is up to you. There is no such thing as the best intermittent fasting plan, so do what makes you feel best and listen to your body.
If it doesn’t work for you, do not force yourself to fast. Intermittent fasting isn’t required to lose weight and improve health on a keto diet. Restricting yourself unrealistically is pointless – it’s not worth it if it makes you unhappy and unhealthy.
The whole point of intermittent fasting is to allow ourselves to increase the amount of food we can intake at one time. Our bodies naturally can only take in a certain amount of food at once, so we are creating a sort of limit on our calorie intake. This is also a great method for people who overeat. I tend to see people that forget to count the snacks that they have throughout the day, and wonder why they are putting weight on.
Your body will adjust itself to fasting, and you will find yourself not as hungry as you used to be. This allows you to properly record and maintain the nutrient values of what you intake.
How Intermittent Fasting Works: Insulin Reduction, Ketone Production, and Autophagy Induction
From a weight-loss perspective, intermittent fasting works by making it harder to overeat throughout the day. A simple rule like “skip breakfast” or “only eat between 5 pm and 8 pm,” can help prevent you from reaching for snacks or drinking calorie-dense beverages throughout the day that contribute to weight gain.
Even if you do build up a ferocious appetite while fasting, you’ll still find it difficult to overeat. In fact, intermittent fasting tends to decrease daily energy consumption and promote fat loss.
This means that you may be able to eat as much as you want and reach your goals as long as you stick to a shortened eating window or a limited number of meals.
When you first try intermittent fasting, your body will need to adjust itself to this new eating schedule. You may be hit hard by hunger pangs and potent cravings at first, but they will soon dissipate as your cells feast on stored fat and ketones.
The key mechanisms behind your ability to fast, lose fat, and improve your health throughout the process are insulin reduction, ketone production, and autophagy. As we accumulate time in a fasted state, our insulin levels decrease incrementally. This promotes the You may want to see also Intermittent fasting is an eating pattern that involves rotating between periods of fasting and normal eating. Popular methods include the 5:2 and 16/8 methods. The keto diet is a high-fat, very low-carb diet linked to potential health benefits, such as weight loss and improved blood sugar control. Combining keto and intermittent fasting may help you reach ketosis faster and result in greater fat loss. It may also be a more natural way of eating and help with weight loss plateaus. Combining keto and intermittent fasting may result in double the side effects of each diet, such as nausea and constipation. It is also a very restrictive diet that may be hard to stick to and not suitable for everyone.Keto Diet: How Much Is Too Much?
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