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#keto flu #keto fatigue #keto diet

Why Do You Feel Tired on a Keto Diet?

Author: Victoria 11 min read
1726
Sep 25, 2023
Why Do You Feel Tired on a Keto Diet?

Feeling tired on keto? For many people, the start of the ketogenic diet is marked by such a symptom as fatigue. This article will also proceed to explain why this is the case and some of the measures you can take to ‘get your energy back’.

Key Takeaways

  • Keto fatigue is sub-felt in the first couple of weeks that a person adopts the keto diet because the body has to change the gears so as to transition from using carbohydrates for energy to fats; this however disappears after sometime.

  • Among the challenges that one is likely to encounter when starting this dietary strategy is the weaning off of electrolytes and water; this should be countered by drinking water and eating foods that contain potassium and magnesium or taking pills.

  • Making sure that one consumes enough and the right type of calories and healthy fats will assist in ruling out this issue as felt on the keto diet. As a result, sufficient amounts for Nutrient rich foods, in addition to caloric intake, along with nutritional fractions, healthy meals, and convenient snacks do enable consumers to sustain energies.

Understanding Keto Fatigue

Nevertheless, people who decide to start a ketogenic diet might begin in the first days of practice with what is called keto fatigue. Acceptance of the oxidation of fat by the body implies that there is extra time that the body takes in developing as well as undertaking the change, energy, and effort. This shift can make you feel like a used car tire, an aspect described as keto flu. One negative aspect is the fact that at first, the body takes a little time to accept the new and natural source of energy, this causes momentary fatigue due to less intake of insulin and no water.

Keto adaptation usually takes one week to several days, and exhaustion may be experienced. This condition of fatigue is normally only temporary, and its occurrence is likely to decrease after your body has completely adjusted to using ketone bodies as fuel. Remember that all these are just a phase of the process of shedding that unwanted fat and having more energy for the future.


The Keto Flu: Common Symptoms and Causes

Some of the possible effects include common symptoms which are referred to as keto flu, this was explained on a scale of mild, moderate, and severe. Some common symptoms include:

  • Headaches

  • Fatigue

  • Irritability

  • Brain fog

  • Muscle cramps

  • Nausea

  • Trouble sleeping

It is normally described by flu-like symptoms, which are the changes that the body systems display any time it adopts this ketogenic diet. These symptoms usually last up to two weeks from the time the ketogenic diet is started.

This can be true if you have the symptoms of keto flu; this is in fact a sign that the body is transforming to ketosis of the low carbohydrate diets. It is a short-term side effect your body produces as it adapts to burning fats instead of carbs. In order to make this transition easier one should participate in the process that will assist in gradually lowering the carb intake while at the same time naturally raising the fat and protein intakes. These works can make your body go to the ketogenic state in a very easy way and prevent or minimize the signs or effects of keto flues.

Dehydration and Electrolyte Imbalances

Of course, the ketogenic diet is also accompanied by the presence of side effects; the more the body diuresis, the more sodium the body retains in water. These first weeks are commonly referred to as keto-adaptation, and in this phase, the body is also flushing out more water thus adequate intake of water is crucial in this ketogenic diet. Dehydration can cause symptoms like:

  • headaches

  • brain fog

  • dizziness

  • overall fatigue

For body health, it would be advisable to take water at various intervals of the day and also incorporate electrolyte in foods taken.

The last parameter, which cannot be left out, is the frequency with which the content of so-called ‘electrolytes’ should be replenished. Symptoms of electrolyte imbalance include:

  • irritability

  • muscle cramps

  • lightheadedness

Some of the foods that are high in electrolytes include nuts and seeds, green vegetables and supplements can also be used in handling such issues. It is also advisable to take bone broth because it contains peptides that are required in the human body for electrolyte replenishment as a result of its diuretic influence.

Insufficient Calorie Intake

A major issue noticed among the ketogenic diets ignorantly followed by many is that such individuals usually undereat. The rate of hunger reduction depicted in the keto diet may make the individual consume less energy compared to the recommended amount. This can reduce the level of energy hormones produced and you end up being a sleepy person and unable to work energetically. It is therefore necessary to take sufficient calories that are subjected in your body to avoid such a drop in energy, though you need to balance them with exercise.

They may thus wish to heed their body’s clues and ensure that it is properly supplied for the needs of energy generation. This can include increasing the amount of fats from nutrient-dense foods so that one can be in adequate calories without feeling so full.

Not Enough Healthy Fats

Similar to the keto diet, fats are utilized to power up the muscle so that it can function for the whole day. If fats are taken in limited quantities, a certain level of weakness creeps into the body. Scientifically proven knowledge says that the consumer should balance the amounts of fats s/he should include in a meal to help the body enter ketosis and get treatment for keto flu. Thus if whilst on the keto diet, you discover that you are ravenously hungry, then only may it be a sign that you are taking in inadequate fats or calories.

To supplement energy stored in the body, one may often eat foods like almonds and macadamia nuts, among others, to provide an energy supply throughout the day. To increase fat consumption, you can add foods like avocados, olive oil, and fatty fish and then check whether you are taking enough fats to enable your body to perform the expected function.

Quality of Food Choices

This is because the kind of foods one uses in the process of the keto diet is what mostly decides the body's energy levels in a rather peculiar manner. Clean keto contains foods such as; Vegetables, lean meats, and fats, while the dirty keto is allowed to have packaged processed yogurt and cheese. Manufactured foods include relative abundances of sugar and fats as well as other operational compounds that have diverse unpleasant effects on the state of the body as well as energy densities.

Gradually though, whole food has over some years been associated with the prevention of lifestyle diseases, mental health, and appropriateness in the management of body weight. Real foods are also never empty of calories – vitamins and minerals as compared to processed foods that assist the body in maintaining the right sugar level and consequently, energy. They should be opted for instead of those nutrient-poor foods as the latter can make one be sleepy most of the time.

Importance of Regular Meals

There is another guideline for the keto diet: take regular meals, but the diet is liberal when it comes to snacks. Every day, it is recommended that one should eat not less than three meals and a few snacks in between to maintain his energy level. This is due to the unstable cycle of meals, which affects energy in turn, especially in the new entrant to the fat-burning ring.

It is recommended that a person must take three to four meals a day so that the blood sugar level can easily be checked and there will be little or no temptation to take a sweet item. Therefore, following the nutrition plan containing the chia and flaxseeds as part of the meal plan will assist in having a steady circulation of energy throughout the day. It also has a fiber constituent that allows the energy levels to be controlled successfully and it will not lead to energy low moments also known as dips.

Managing Carb Intake

The necessity of following the restrictions between the carbs consumption is important to maintain the ketosis state not to be tired. According to the book Dr. Atkins's New Diet Revolution, the ketogenic diet plan is a low-carbohydrate diet in which an individual should take carbs of not more than 50 grams per day. Taking the blood ketone test every morning will help in monitoring that the body is in ketosis and correct the cases of fatigue.

For physically active people, such as sportsmen, the intake of carbs can also be increased during the application of the standard ketogenic diet. It is advisable to use gadgets like blood ketone meters or breath analyzers and adjust the intake of carbohydrates for persons with ketone hyperside.

Addressing Protein Intake

However, vital protein is hardly eaten while on a keto diet, and this has some consequences for an individual's well-being. This source should represent about a fifth of your total daily allowance, and the foods that are included are bonnie brokers, steak, and chicken, among others.

As it is proposed that 0bw is not a viable option for a heavy smoker like myself, there needs to be an alternative solution that includes a recommended patch value. 8-1. It is recommended that a zero protein per pound of mass of lean body mass is perfect for cutting, whereas for the building of muscles, the recommended amount is 20-30 grams of protein per meal is beneficial. Sources of high-protein, low-carb foods include:

  • fish

  • poultry

  • eggs

  • cheese

  • nuts

  • tofu

Other data point to the fact that to avoid the emergence of muscles, elderly persons and those who performed the RT need it more.

Supplements to Support Energy Levels

While it is possible to modulate the effects of ketogenic diets, including some supplements in your diet might help in maintaining one's energy on ketogenic diets. Investigation has shown that quality electrolyte supplements from reliable sources can contribute to the alleviation of fatigue by replenishing the body’s electrolyte levels. The MCT oil which is a fat that digests quickly enables one to remain in a state of ketosis; the same fat boosts energy.

Also, certain external ketones can increase the level of blood ketones and would, therefore, be useful to athletic performance. The usefulness of omega-3 fatty acids from fish or krill oil involves reducing inflammation, and it is greatly beneficial to the heart. Vegetable powders such as spinach, spirulina, or kale will add other nutrients if there is very little or no vegetable intake.

Lifestyle Factors: Sleep and Stress

Moreover, on this diet, special emphasis should be placed on the quantity and quality of sleep and stress levels. Over and above this, a shortage of Insulin has one of the following impacts: Sleep is a leading cause of fatigue. The recommended sleep time for the keto diet is 8 hours per night.

Some of the changes that occur to the body, which are characteristic of the ketogenic diet affect the brain and the nervous system; thus raising stress during the initial stages. Stress can be managed through activities like meditation, exercise and rest excluding feeling thoroughly drained up or having a general feeling of being unwell.

Summary

All in all, experiencing fatigue on the keto diet is a normal issue, which can be comprehensible and managed, without much stress. To the best of human knowledge, keto fatigue is caused by the following factors, and their resolutions are provided below; Once you know how to deal with keto fatigue, you will be able to embrace the ketogenic diet fully and enjoy life. Remember to take sufficient water, enough calories and fat, Control your carbohydrate intake, control your protein intake, and modify your exercises. By implementing these tips, one will be able to sustain his or her energy levels and thus attain the desired health and weight loss goals.

Frequently Asked Questions

What causes keto fatigue?

Keto fatigue is mainly due to the body's transition from carbohydrates to fats as its main source of fuel, a process that takes time and, thus, leads to weakness.

How long does the keto flu last?

The ketogenic flu can persist for a few days up to two weeks due to the body’s transition to the ketogenic diet. During this time, you may have headaches, fatigue, irritability, and muscle cramps.

How can I manage dehydration on the keto diet?

Common keto foods include meat, fish, eggs, nuts, and non-starchy vegetables. To avoid moderate to severe dehydration on the keto diet, one must ensure that they drink a lot of water and also eat foods rich in electrolytes such as nuts, seeds, and green leafy vegetables. If the condition becomes unbearable, one can take electrolyte supplements.

What should I do if I’m not eating enough calories on keto?

See to it that you partake in high fat, nutrient-rich foods and always pay heed to your body when you feel the need to add a few calories more to prevent you from getting fatigued.

Are there any supplements that can help with energy levels on keto?

Indeed, the keto diet is helpful in boosting energy by using certain quality electrolyte supplements, MCT oil, exogenous ketones, omega-3 fats, and greens powders. However, it suggests that you should seek a doctor’s advice before considering incorporating any supplement into your diet.


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Paoli, A. (2014). Ketogenic diet for obesity: friend or foe?. International journal of environmental research and public health, 11(2), 2092-2107.
Volek, J. S., & Phinney, S. D. (2012). The Art and Science of Low Carbohydrate Performance. Beyond Obesity LLC.
Dashti, H. M., Mathew, T. C., Khadada, M., Al-Mousawi, M., Talib, H., Asfar, S. K., ... & Al-Zaid, N. S. (2007). Beneficial effects of ketogenic diet in obese diabetic subjects. Molecular and cellular biochemistry, 302(1-2), 249-256.
Masood, W., & Uppaluri, K. R. (2019). Ketogenic Diet. In StatPearls. StatPearls Publishing.
Harvard Health Publishing. (2018). Should you try the keto diet?. Harvard Medical School. https://www.health.harvard.edu/staying-healthy/should-you-try-the-keto-diet
Mayo Clinic Staff. (2020). Ketosis. In Mayo Clinic. https://www.mayoclinic.org/healthy-lifestyle/weight-loss/in-depth/the-truth-behind-the-most-popular-diet-trends-of-the-moment/art-20390062
Mawer, R. (2018). What Is the Keto Flu and How to Prevent It. Healthline. https://www.healthline.com/nutrition/keto-flu-symptoms
Tello, M. (2018). Ketogenic diet: Is the ultimate low-carb diet good for you?. Harvard Health Blog. https://www.health.harvard.edu/blog/ketogenic-diet-is-the-ultimate-low-carb-diet-good-for-you-2017072712089
Harvard Health Publishing. (2020). Should You Try the Keto Diet? Harvard University. https://www.health.harvard.edu/staying-healthy/should-you-try-the-keto-diet
Mayo Clinic Staff. (2020). Ketosis. In Mayo Clinic. https://www.mayoclinic.org/healthy-lifestyle/weight-loss/in-depth/the-truth-behind-the-most-popular-diet-trends-of-the-moment/art-20390062
Mawer, R. (2018). What Is the Keto Flu and How to Prevent It. Healthline. https://www.healthline.com/nutrition/keto-flu-symptoms
Tello, M. (2018). Ketogenic diet: Is the ultimate low-carb diet good for you?. Harvard Health Blog. https://www.health.harvard.edu/blog/ketogenic-diet-is-the-ultimate-low-carb-diet-good-for-you-2017072712089
Mawer, R. (2017). 7 Tips To Get Into Ketosis. Healthline. https://www.healthline.com/nutrition/7-tips-to-get-into-ketosis
Healthline. (2018). What You Need to Know About Keto Fatigue. [https://www.healthline.com/health/keto-fatigue](https://www.healthline.com/health/keto-fatigue)
Masood, W., Uppaluri, K. R. (2018). Ketogenic Diet. StatPearls. https://www.ncbi.nlm.nih.gov/books/NBK499830/
Tello, M. (2018). Ketogenic diet: Is the ultimate low-carb diet good for you?. Harvard Health Blog. https://www.health.harvard.edu/blog/ketogenic-diet-is-the-ultimate-low-carb-diet-good-for-you-2017072712089
Paoli, A., Rubini, A., Volek, J. S., & Grimaldi, K. A. (2013). Beyond weight loss: a review of the therapeutic uses of very-low-carbohydrate (ketogenic) diets. European journal of clinical nutrition, 67(8), 789–796. https://doi.org/10.1038/ejcn.2013.116
Gibson, A. A., Seimon, R. V., Lee, C. M., Ayre, J., Franklin, J., Markovic, T. P., Caterson, I. D., & Sainsbury, A. (2015). Do ketogenic diets really suppress appetite? A systematic review and meta-analysis. Obesity reviews : an official journal of the International Association for the Study of Obesity, 16(1), 64–76. https://doi.org/10.1111/obr.12230
Evans, M., Cogan, K. E., & Egan, B. (2017). Metabolism of ketone bodies during exercise and training: physiological basis for exogenous supplementation. The Journal of physiology, 595(9), 2857–2871. https://doi.org/10.1113/JP273185
Maalouf, M., Rho, J. M., & Mattson, M. P. (2009). The neuroprotective properties of calorie restriction, the ketogenic diet, and ketone bodies. Brain research reviews, 59(2), 293–315. https://doi.org/10.1016/j.brainresrev.2008.09.002
Poplawski, M. M., Mastaitis, J. W., Isoda, F., Grosjean, F., Zheng, F., & Mobbs, C. V. (2011). Reversal of diabetic nephropathy by a ketogenic diet. PLoS One, 6(4), e18604. https://doi.org/10.1371/journal.pone.0018604
Paoli, A. (2014). Ketogenic diet for obesity: friend or foe?. International journal of environmental research and public health, 11(2), 2092–2107. https://doi.org/10.3390/ijerph110202092
McSwiney, F. T., Wardrop, B., Hyde, P. N., Lafountain, R. A., Volek, J. S., & Doyle, L. (2018). Keto-adaptation enhances exercise performance and body composition responses to training in endurance athletes. Metabolism: clinical and experimental, 81, 25–34. https://doi.org/10.1016/j.metabol.2017.10.010
Phinney, S. D., Bistrian, B. R., Evans, W. J., Gervino, E., & Blackburn, G. L. (1983). The human metabolic response to chronic ketosis without caloric restriction: preservation of submaximal exercise capability with reduced carbohydrate oxidation. Metabolism: clinical and experimental, 32(8), 769–776. https://doi.org/10.1016/0026-0495(83)90106-3
Urbain, P., & Bertz, H. (2016). Monitoring for compliance with a ketogenic diet: what is the best time of day to test for urinary ketosis?. Nutrition & metabolism, 13, 77. https://doi.org/10.1186/s12986-016-0136-4
Lamb, D. A., McKeever, T. M., & Ellison, G. C. (2020). The Effectiveness of the Ketogenic Diet in Reducing Drug-Use for Patients with Epilepsy. Epilepsy research, 163, 106324. https://doi.org/10.1016/j.eplepsyres.2020.106324
Paoli, A., Bianco, A., Damiani, E., & Bosco, G. (2014). Ketogenic diet in neuromuscular and neurodegenerative diseases. BioMed research international, 2014, 474296. https://doi.org/10.1155/2014/474296
Prins, P. J., Noakes, T. D., Welton, G. L., Haley, S. J., Esbenshade, N. J., Atwell, A. D., Scott, K. E., & Abraham,
Maalouf, M., Rho, J. M., & Mattson, M. P. (2009). The neuroprotective properties of calorie restriction, the ketogenic diet, and ketone bodies. Brain Research Reviews, 59(2), 293–315. https://doi.org/10.1016/j.brainresrev.2008.09.002
Volek, J. S., & Phinney, S. D. (2011). The Art and Science of Low Carbohydrate Performance. Beyond Obesity LLC.
Furth, A., & Pyzik, P. L. (2017). Keto: The Complete Guide to Success on The Ketogenic Diet, including Simplified Science and No-cook Meal Plans. Victory Belt Publishing.
Evans, M., Cogan, K. E., & Egan, B. (2017). Metabolism of ketone bodies during exercise and training: physiological basis for exogenous supplementation. Journal of Physiology, 595(9), 2857–2871. https://doi.org/10.1113/JP273185
Phinney, S. D. (2004). Ketogenic diets and physical performance. Nutrition & Metabolism, 1(1), 2. https://doi.org/10.1186/1743-7075-1-2
Paoli, A., Rubini, A., Volek, J. S., & Grimaldi, K. A. (2013). Beyond weight loss: a review of the therapeutic uses of very-low-carbohydrate (ketogenic) diets. European Journal of Clinical Nutrition, 67(8), 789–796. https://doi.org/10.1038/ejcn.2013.116
Volek, J. S., Freidenreich, D. J., Saenz, C., Kunces, L. J., Creighton, B. C., Bartley, J. M., ... & Lee, E. C. (2016). Metabolic characteristics of keto-adapted ultra-endurance runners. Metabolism, 65(3), 100–110. https://doi.org/10.1016/j.metabol.2015.10.028
Masino, S. A., & Rho, J. M. (Eds.). (2012). Ketogenic Diet and Metabolic Therapies: Expanded Roles in Health and Disease. Oxford University Press.
Mawer, R. (2017). The Ketogenic Diet: A Detailed Beginner's Guide to Keto. Healthline Media.
Gibson, A. A., Seimon, R. V., Lee, C. M. Y., Ayre, J., Franklin, J., Markovic, T. P., ... & Sainsbury, A. (2015). Do ketogenic diets really suppress appetite? A systematic review and meta‐analysis. Obesity Reviews, 16(1), 64-76. [Link](https://onlinelibrary.wiley.com/doi/full/10.1111/obr.12230)
Maalouf, M., Rho, J. M., & Mattson, M. P. (2009). The neuroprotective properties of calorie restriction, the ketogenic diet, and ketone bodies. Brain research reviews, 59(2), 293-315. [Link](https://www.sciencedirect.com/science/article/pii/S0165017308001045)
Volek, J. S., & Phinney, S. D. (2012). The Art and Science of Low Carbohydrate Performance. Beyond Obesity.
Paoli, A., Rubini, A., Volek, J. S., & Grimaldi, K. A. (2013). Beyond weight loss: a review of the therapeutic uses of very-low-carbohydrate (ketogenic) diets. European journal of clinical nutrition, 67(8), 789–796. [Link](https://www.nature.com/articles/ejcn2013116)
Mawer, R. (2018). The 7 Best Substitutes for Sour Cream. Healthline. Link
VanDerschelden, J. (2016). The Sleep Solution: Why Your Sleep is Broken and How to Fix it. Wellness Mama. Link
Masino, S. A., & Rho, J. M. (2012). Mechanisms of Ketogenic Diet Action. In Noebels J., Avoli M., Rogawski M., Olsen R., Delgado-Escueta A. (Eds.), [Jasper's Basic Mechanisms of the Epilepsies](https://www.ncbi.nlm.nih.gov/books/NBK98219/). National Center for Biotechnology Information (US).
Paoli, A., Rubini, A., Volek, J. S., & Grimaldi, K. A. (2013). Beyond weight loss: a review of the therapeutic uses of very-low-carbohydrate (ketogenic) diets. [European journal of clinical nutrition](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3826507/), 67(8), 789–796.
Harvard T.H. Chan School of Public Health. (2019). [Sleep and Disease Risk](https://www.hsph.harvard.edu/nutritionsource/sleep/). The Nutrition Source.
Włodarek D. (2019). Role of Ketogenic Diets in Neurodegenerative Diseases (Alzheimer's Disease and Parkinson's Disease). [Nutrients](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6356942/), 11(1), 169.
Popkin, B. M., D'Anci, K. E., & Rosenberg, I. H. (2010). Water, hydration, and health. Nutrition reviews, 68(8), 439–458. https://doi.org/10.1111/j.1753-4887.2010.00304.x
Layman, D. K. (2003). The role of leucine in weight loss diets and glucose homeostasis. The Journal of Nutrition, 133(1), 261S-267S. https://doi.org/10.1093/jn/133.1.261S
Westman, E. C., Yancy, W. S., Mavropoulos, J. C., Marquart, M., & McDuffie, J. R. (2008). The effect of a low-carbohydrate, ketogenic diet versus a low-glycemic index diet on glycemic control in type 2 diabetes mellitus. Nutrition & metabolism, 5, 36. https://doi.org/10.1186/1743-7075-5-36
Gominak, S. C., & Stumpf, W. E. (2012). The world epidemic of sleep disorders is linked to vitamin D deficiency. Medical hypotheses, 79(2), 132–135. https://doi.org/10.1016/j.mehy.2012.03.031
Mann, T., Tomiyama, A. J., Westling, E., Lew, A. M., Samuels, B., & Chatman, J. (2007). Medicare’s search for effective obesity treatments: Diets are not the answer. American Psychologist, 62(3), 220–233. https://doi.org/10.1037/0003-066X.62.3.220
Adam-Perrot, A., Clifton, P., & Brouns, F. (2006). Low-carbohydrate diets: nutritional and physiological aspects. Obesity reviews : an official journal of the International Association for the Study of Obesity, 7(1), 49–58. https://doi.org/10.1111/j.1467-789X.2006.00222.x
Paoli, A., Rubini, A., Volek, J. S., & Grimaldi, K. A. (2013). Beyond weight loss: a review of the therapeutic uses of very-low-carbohydrate (ketogenic) diets. European journal of clinical nutrition, 67(8), 789–796. https://doi.org/10.1038/ejcn.2013.116
DiNicolantonio, J. J., O'Keefe, J. H., & Wilson, W. (2018). Subclinical magnesium deficiency: a principal driver of cardiovascular disease and a public health crisis. Open Heart, 5(1), e000668. [Link](https://openheart.bmj.com/content/5/1/e000668)
Swanson, D., Block, R., & Mousa, S. A. (2012). Omega-3 fatty acids EPA and DHA: health benefits throughout life. Advances in Nutrition, 3(1), 1-7. [Link](https://academic.oup.com/advances/article/3/1/1/4557081)
Holick, M. F. (2007). Vitamin D deficiency. The New England Journal of Medicine, 357(3), 266-281. [Link](https://www.nejm.org/doi/full/10.1056/nejmra070553)
Rautiainen, S., Manson, J. E., Lichtenstein, A. H., & Sesso, H. D. (2016). Dietary supplements and disease prevention - a global overview. Nature Reviews Endocrinology, 12(7), 407-420.

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