One of the diet programs gaining popularity over the last several years has been the ketogenic diet. A diverse group of people have seen dramatic weight-loss results by adhering to the low-carb, high-fat diet.
The ketogenic diet allows your body to use fat as its main fuel source instead of running on blood glucose and stored glycogen (which is created when you consume carbohydrates). By eliminating carbohydrates almost entirely from your diet, the body is redirected into a state with increased rates of lypolysis (fat breakdown), ketogenesis (making ketones) and gluconeogenesis (making new glucose). This means that fat is the main fuel source for most of the body's needs, and newly synthesized ketones and glucose are prioritized for the brain.
From a high level, the diet has many benefits, including:
Let’s explore a few common considerations of the diet before jumping into why you may lose electrolytes, and how to get them back.
While there’s a long list of benefits of the keto diet, there are also usually questions to be asked. You can learn more about those questions here, in our article debunking keto myths.
Common considerations for keto often circle around health and performance: Doesn’t everyone need carbohydrates as a fuel source to function and perform at optimal levels? What if I’m an athlete? Will my workouts suffer?
The short answer? No. It’s not actually essential for anyone to consume carbs. Although there has long been a common perception that athletes must consume carbohydrates to perform at max efficiency, this narrative has been shown to be conditionally false. Recent studies performed on low-carbohydrate diets among endurance athletes proved that over several weeks, athletes improved body composition and scored stronger in specific measures of performance. That said, this is still a topic of debate and active research; some studies have shown that keto either has no clear effect, or a negative effect on performance.1,2,3 If you’re doing a high-intensity workout, you’ll likely still need carbs as a fast-acting energy source.
Endurance athletes may particularly benefit from keto as they become fat-adapted.
This means their bodies have learned to tap into the “limitless” fat stores, lowering the chance of bonking that regular athletes experience when they’re carb-depleted.
What about eating all that fat? The ketogenic diet often gets the rap for consisting strictly of fatty foods such as butter, bacon, and whole eggs. This is a common misnomer, as several different food sources should be included to create a perfect keto diet.
A list of keto-friendly foods might include:
After performance and macronutrient composition, the next question often asked is around electrolytes. One potential side effect of a keto diet is that it may alter electrolyte balance within your body. Regular people have probably heard of electrolytes in passing, and athletes training regularly use electrolyte hydration tablets to top up the losses from sweat. But just what are electrolytes?
Electrolytes are minerals within your body that aid in cellular and organ function. They’re essential for a number of bodily functions and are necessary for survival.
The most important functions of electrolytes are to maintain hydration and acidity levels in the body, and help maintain muscle and nerve function.
Some of the most common electrolytes (minerals) found in the body include:
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Each electrolyte must be kept within a healthy range in order for our bodies to perform at their best, but staying in range can become an issue when you start to follow a ketogenic diet.
Once you start drastically reducing carbohydrate intake, the body begins to process electrolytes differently. On keto, less insulin is released, causing the kidneys to excrete more sodium. As your body begins to lose sodium, this can also impact the balance of other key electrolytes in your body.
This electrolyte imbalance is often linked to symptoms of “keto flu.” As carb intake decreases, electrolytes are increasingly excreted from the body in urine. The keto flu symptoms can be triggered by imbalances of several electrolytes, but the normal culprits are sodium, potassium, and magnesium.
The keto flu isn’t characterized by the same symptoms as the traditional flu, and it’s not just electrolytes to blame. Lack of carbohydrates in people who are carb dependent can lead to even more nasty symptoms. Not to say this is akin to withdrawal from alcohol or drugs, but the body does experience similarities in terms of withdrawal from something to which it has become accustomed (carbohydrates in this case).
The physical and mental dependence on carbohydrates stems from the body habitually relying on glucose as its main energy and fuel source.
When taken away, the body essentially needs to learn how to process fat as a fuel source, and enter a state of ketosis.
Some of the most common keto flu symptoms include:
Since insulin levels remain lower in a keto diet due to lack of carbohydrates, the kidneys may excrete critical electrolytes such as sodium, potassium, and more. Therefore, it’s essential for people following the ketogenic diet to increase intake of these electrolytes through diet or other supplementation.
First up—we should point out that you shouldn’t rely on supplementation as your main source of minerals and micronutrients when following the keto diet. Any type of supplementation on top of your diet should be a last resort; try and use an array of food choices before turning to supplements. Supplements were not created to replace other diet essentials but rather, bump intake up to normal levels if not possible otherwise.
Not all people will exhibit keto flu symptoms when going through the diet transition period. Some are able to switch to a keto diet with little-to-no side effects. However, for a number of people, removing carbs from your diet will have some effect on mineral balance in body, so you need to up your intake.
This is even truer for athletes. Athletes tend to excrete a higher level of electrolytes through sweat, leading to a further loss of electrolytes such as sodium, potassium, and magnesium.4 Therefore, if you are an athlete choosing to follow a ketogenic diet, you may want to consider adding supplementation to minimize mineral deficiencies.
An electrolyte supplement may be the a key ingredient towards maximizing your keto workout. Here are a few to consider.
Most people tend to think of sodium as simple table salt. Truth is, sodium is far from simple; it has widespread functions and plays a vital role in overall health. It’s considered one of the most important electrolytes in the body.
The sodium ion is needed to help the body function properly by playing a role in the activation of muscle contraction machinery.
Most of the body’s sodium is found in the blood and in fluid around the cells. The body loses sodium through sweat and urination, which makes excessive sodium loss a particular risk for athletes. They sweat during exercise, and water and electrolyte intake is often insufficient to replace lost fluids.4
Supplementing sodium in your diet protects the function of a myriad of essential physiological processes, including:
You many think you are getting enough sodium, but consider—have you experienced any of these symptoms? Sweaty endurance athletes especially need to watch out for these signs of falling sodium levels!
Sodium intake should remain relatively constant over time as drastic fluctuations may lead to negative side effects.9 The Center for Disease control recommends consuming 2,300mg of sodium per day but an athletic individual following the keto lifestyle may need to increase sodium intake as a way of maintaining electrolyte balance in their low carb state.10
There are a number of ways to combat excessive sodium loss.
Try using more table salt or sodium chloride in everyday foods; Himalayan sea salt is one of the best-tasting, natural salt additives. During training or events, you can eat salty snacks or performance drinks that have a high sodium content.
For years, there was a stigma attached to sodium. People believed high sodium intake was correlated to heart disease or high blood pressure. However, more recent research has forced scientists to reopen the debate about the effects of sodium on health.11 In a epidemiological study of nearly 100,000 subjects, sodium was only found to increase mortality at very high doses, and in other similar studies, low sodium consumption was also associated with increased mortality risk.12,13
Potassium is the mineral we associate with cramps—you’ve probably been told by your mother to have a banana on hand as an anti-cramp superfood. Like sodium, potassium is a key electrolyte for normal function of our bodies, and it’s not just there to keep us cramp free.
Supplementing with potassium helps to protect many processes in the body, including:
Many people don’t get the daily recommended amount of potassium in their diets. But just how much is needed?
The World Health Organization recommends ~3,500mg per day of potassium, but most individuals tend to have a daily intake of far less.
The result? Possibly some of these common side effects of potassium deficiency: hypertension, adverse cardiovascular effects, kidney damage or failure, heart palpitations and muscle cramps.14
Low-carb or ketogenic diets have the potential to cause a decrease in potassium. If you’re not getting enough potassium as part of your low-carb diet, there are a number of food options available to increase potassium intake:
These food sources do wonders for upping potassium intake as part of a balanced diet, but a lot of people do not have time to prepare vegetables with their busy schedules. If this is the case with you, potassium supplements may be a viable alternative.
Potassium chloride is one supplement option to help top up these important electrolytes. In a study performed on individuals who took potassium chloride as a potassium supplement, it was found that health problems were mitigated when taken regularly.15
Potassium can also significantly lower blood pressure.15 By taking it daily, you can help ensure that your organs (including the heart, muscles, kidneys, and nerves) are functioning at optimal levels.
If you’re extremely active, chances are your potassium needs may be greater than other subsets of the population.16 Potassium supplements are typically available as 99mg tablets. Taking potassium supplements may help your electrolyte balance stay within normal recommended levels, even when following a ketogenic diet.
Magnesium is the fourth most abundant mineral in the body. It has a number of functions within the body that make it important for maintaining proper electrolyte balance.17
Magnesium is responsible for some of the most important life processes:
Do you have low levels of magnesium? You’re not alone.
Chances are spotting a deficiency may be a bit more challenging compared to other electrolytes, but still, large numbers of the population are deficient. Having an improper balance of magnesium may result in leg cramps, neuromuscular disorders, or cardiac disorders.18
Interestingly, magnesium deficiency has shown to have other effects on personality changes, including depression, anxiety, agitation, confusion and delirium.19
The majority of common household foods contain only small amounts of magnesium, but many of them are acceptable as part of the ketogenic diet. Options include:
Unfortunately, some of these items take time to prepare or tend to be expensive. The good news, though: if you are lacking magnesium as part of your diet, there are several supplements on the market that can bring you up to sufficient levels.
One popular choice is magnesium chloride. In recent studies, it has been suggested that magnesium supplements may even be able to help treat depression and improve the overall mood of individuals that take them. For most people, 400mg of magnesium daily will be optimal.19
Whether or not you choose to take mineral supplements is entirely up to you. Everyone may not need them; supplementation use is entirely individual.
But if you’re still experiencing symptoms of the keto flu, you might be more inclined to try supplements than your keto buddy.
While loss of electrolytes and low glucose lead to keto flu symptoms, there is hope (even without carb-binging). Sort out the fluid and electrolyte issues by focusing on your hydration, taking extra electrolytes and fight the low-glucose slump by using exogenous ketones. HVMN Ketone has been shown to rapidly put you in a deep state of ketosis, while helping curb some of the pain of the keto flu while your body transitions into using fat as fuel.
Peak performance—whether at the office or on the field—is your goal. Never let you diet dictate those results, and make adjustments as necessary to perform your best no matter what.
Subscribe to get our guide that accounts for nutrition and fitness when picking a ketone supplement.
|1.||Zajac, A., Poprzecki, S., Maszczyk, A., Czuba, M., Michalczyk, M., and Zydek, G. (2014). The effects of a ketogenic diet on exercise metabolism and physical performance in off-road cyclists. Nutrients 6, 2493-2508.|
|2.||Rodger, S., Plews, D., Laursen, P., and Driller, M. (2017). The effects of an oral β-hydroxybutyrate supplement on exercise metabolism and cycling performance.|
|3.||Burke, L.M., Ross, M.L., Garvican-Lewis, L.A., Welvaert, M., Heikura, I.A., Forbes, S.G., Mirtschin, J.G., Cato, L.E., Strobel, N., Sharma, A.P., et al. (2017). Low carbohydrate, high fat diet impairs exercise economy and negates the performance benefit from intensified training in elite race walkers. J. Physiol. 595, 2785-2807.|
|4.||Baker LB. Sweating Rate and Sweat Sodium Concentration in Athletes: A Review of Methodology and Intra/Interindividual Variability. Sports Med. 2017;47(Suppl 1):111-128.|
|5.||Orchardson R, Peacock JM. Factors affecting nerve excitability and conduction as a basis for desensitizing dentine. Arch Oral Biol. 1994;39 Suppl:81S-86S.|
|6.||Cowley AW, Roman RJ. Control of blood and extracellular volume. Baillieres Clin Endocrinol Metab. 1989;3(2):331-69.|
|7.||Hurley SW, Johnson AK. The biopsychology of salt hunger and sodium deficiency. Pflugers Arch. 2015;467(3):445-56.|
|8.||Eichner ER. The role of sodium in 'heat cramping'. Sports Med. 2007;37(4-5):368-70.|
|9.||Braun MM, Barstow CH, Pyzocha NJ. Diagnosis and management of sodium disorders: hyponatremia and hypernatremia. Am Fam Physician. 2015;91(5):299-307.|
|10.||Centers for Disease Control. Salt Reviews 2018. https://www.cdc.gov/salt/research_reviews/sodium_potassium_blood_pressure.htm. Accessed February 8, 2019.|
|11.||Alderman MH, Cohen H, Madhavan S. D. Dietary sodium intake and mortality: the National Health and Nutrition Examination Survey (NHANES I). 1998;351(9105):781-785. doi:https://doi.org/10.1016/S0140-6736(97)09092-2.|
|12.||Graudal N, Jürgens G, Baslund B, Alderman MH. Compared with usual sodium intake, low- and excessive-sodium diets are associated with increased mortality: a meta-analysis. Am J Hypertens. 2014;27(9):1129-37.|
|13.||Mente A, O'Donnell M, Rangarajan S. Urinary sodium excretion, blood pressure, cardiovascular disease, and mortality: a community-level prospective epidemiological cohort study. The Lancelet. 2018;392(10146):496-506. doi:https://doi.org/10.1016/S0140-6736(18)31376-X.|
|14.||Rodan AR. Potassium: friend or foe?. Pediatr Nephrol. 2017;32(7):1109-1121.|
|15.||He FJ, Markandu ND, Coltart R, Barron J, Macgregor GA. Effect of short-term supplementation of potassium chloride and potassium citrate on blood pressure in hypertensives. Hypertension. 2005;45(4):571-4.|
|16.||Zorbas YG, Kakurin VJ, Afonin VB, Charapakhin KP, Denogradov SD. Potassium supplements' effect on potassium balance in athletes during prolonged hypokinetic and ambulatory conditions. Biol Trace Elem Res. 2000;78(1-3):93-112.|
|17.||Gröber U, Schmidt J, Kisters K. Magnesium in Prevention and Therapy. Nutrients. 2015;7(9):8199-226.|
|18.||Kirkland AE, Sarlo GL, Holton KF. The Role of Magnesium in Neurological Disorders. Nutrients. 2018;10(6)|
|19.||Serefko A, Szopa A, Poleszak E. Magnesium and depression. Magnes Res. 2016;29(3):112-119.|
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