The keto diet is a low-carb, high-fat diet that has been recognised as a treatment for certain conditions since the 1920s. When you're on the keto diet, your body enters a state called ketosis, where it turns fat into ketones that fuel your brain. However, this process can cause an electrolyte imbalance, leading to symptoms like brain fog, dizziness, diarrhoea, and muscle cramps—commonly known as the keto flu.
To combat this, it's important to include electrolyte-rich foods in your diet. Some keto-friendly options include leafy greens, nuts, seeds, and fatty fish like salmon. Avocados are also a good source of potassium and magnesium. Bone broth is another great option, as it's a superfood that provides collagen and electrolytes.
If you're having trouble getting enough electrolytes from food alone, you can also try electrolyte supplements. These come in powder or capsule form and can be added to water or taken with meals. Just be sure to speak with your doctor before starting any new supplement, especially if you have any health conditions.
What You'll Learn
- Sodium, potassium, and magnesium deficiencies can cause keto flu symptoms
- The keto diet can cause an electrolyte imbalance
- Foods rich in electrolytes include nuts, seeds, and green vegetables
- Electrolyte supplements can help prevent keto flu symptoms
- Dehydration and an electrolyte imbalance can cause similar symptoms
Sodium, potassium, and magnesium deficiencies can cause keto flu symptoms
When starting a keto diet, it is common to experience symptoms such as low energy, muscle cramps, brain fog, headaches, weakness, insomnia, and other symptoms of the infamous "keto flu." This is often due to a bumpy transition to fat-burning, but in many cases, it is caused by low electrolytes. Electrolytes are minerals that conduct electrical charges in the body, allowing nerve cells to communicate and enabling essential functions such as heartbeat regulation, body temperature management, and neurological functions.
Sodium, potassium, and magnesium deficiencies can all contribute to keto flu symptoms. Here's how:
Sodium Deficiency
Sodium is the main electrolyte found in extracellular fluid, and it is needed to maintain blood volume. Low sodium, or hyponatremia, is the most common deficiency for low-carb dieters. It can lead to symptoms such as difficulty concentrating, fatigue, muscle cramps, and headaches. To increase sodium intake, it is recommended to salt food to taste, add sodium-rich bone broth or bouillon, and consume salty foods like pickles.
Potassium Deficiency
Potassium is the third most abundant mineral in the body and is involved in the "sodium-potassium pump," which helps move molecules across cell membranes. A potassium deficiency, or hypokalemia, can lead to conditions like cramps, heart arrhythmias, fatigue, high blood pressure, muscle weakness, and nausea. Avocados, Brussels sprouts, mushrooms, and salmon are good sources of potassium on a keto diet.
Magnesium Deficiency
Magnesium usually doesn't function as an electricity-conducting electrolyte, but it is essential for hundreds of other bodily functions. A magnesium deficiency may cause muscle twitching or cramping, especially at night or after exercise. Good sources of magnesium on a keto diet include pumpkin seeds, dark chocolate, avocado, low-carb nuts, fish, and leafy greens.
To prevent or alleviate keto flu symptoms, it is important to ensure adequate intake of sodium, potassium, and magnesium. This can be achieved through diet or, if necessary, with the addition of supplements.
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The keto diet can cause an electrolyte imbalance
The keto diet is a low-carb diet that can lead to a greater risk of dehydration and electrolyte imbalance. This is because the body is retaining less water when following a low-carb diet. When insulin levels drop, the body reacts by ridding itself of excess water and sodium, which bind themselves to glycogen (stored carbohydrates) in your system.
Symptoms of an electrolyte imbalance
If you don't replace lost electrolytes, you may experience symptoms such as dehydration, tiredness, and lightheadedness. Other symptoms include:
- Poor performance during workouts
- Increased thirst
- Headaches
- Fatigue
- Weakness
- Dizziness
- Brain fog
- Muscle cramps
- Insomnia
- Heart palpitations
- Irregular heartbeat
- Nausea
- Vomiting
- Loss of consciousness
How to prevent or address an electrolyte imbalance on a keto diet
- Eat more electrolyte-rich foods such as nuts, seeds, leafy greens, avocado, and salmon.
- Choose an electrolyte drink or supplement that is sugar-free and keto-friendly.
- Take a magnesium supplement, especially if you experience muscle twitching or cramping.
- Be liberal with the salt shaker at mealtimes.
- Drink bone broth or bouillon, which contain sodium.
- Eat more potassium-rich foods such as avocado, Swiss chard, spinach, mushrooms, and broccoli.
- Speak to your doctor about taking a calcium supplement, especially if you are not consuming enough calcium-rich foods like dairy, bones, and cruciferous vegetables.
- Slowly transition into the keto diet to prevent keto flu symptoms and electrolyte imbalances.
- If you are taking medications, talk to your doctor before starting the keto diet, as some medications can affect electrolyte levels.
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Foods rich in electrolytes include nuts, seeds, and green vegetables
Nuts
Nuts are a great source of electrolytes, specifically almonds. They are also a good source of healthy fats and protein, which can help to keep you feeling full and satisfied.
Seeds
Seeds are another food group that is rich in electrolytes. Some popular electrolyte-containing seeds include pumpkin seeds, sunflower seeds, and flax seeds. These seeds are also a good source of fibre, which can help with digestion and lower cholesterol levels.
Green Vegetables
Green vegetables are a great way to get your daily dose of electrolytes. Some of the best green vegetables for electrolytes include spinach, broccoli, and avocado. These vegetables are also packed with other essential nutrients like vitamins and minerals, which can help boost your overall health.
Other green vegetables that are rich in electrolytes include asparagus, cucumber, and green beans. These vegetables are also low in calories and high in fibre, making them a great choice for those watching their weight.
In addition to nuts, seeds, and green vegetables, other foods that are rich in electrolytes include coconut water, beef, chicken, eggs, clams, salmon, and yogurt. It is important to ensure that you are getting enough electrolytes in your diet, as they are vital for the proper functioning of your body. Electrolyte imbalances can lead to a range of problems, from headaches and muscle cramps to more serious issues like convulsions and irregular heartbeats.
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Electrolyte supplements can help prevent keto flu symptoms
The keto flu is a collection of flu-like symptoms that can occur when you transition to a ketogenic diet. This is not to be confused with actual flu, and it is not contagious. The keto flu is caused by your body adjusting to the new metabolic state of ketosis and reduced carbohydrate intake.
One of the primary causes of keto flu is an electrolyte imbalance. Electrolytes are minerals that conduct electricity when dissolved in water and are necessary for critical body functions. They regulate the amount of water in your body, pH levels, nutrient transportation, waste removal, and nerve, muscle and brain function.
When you restrict carbohydrates, your body produces less insulin, causing your kidneys to flush out excess water and sodium. To maintain the balance between sodium and other electrolytes, your kidneys will also release extra potassium, calcium and magnesium. Without enough of these electrolytes in your body, you will experience symptoms of keto flu.
- Sodium – found in salt, bone broth, bouillon cubes, bacon, salted nuts, and pickles.
- Magnesium – found in seaweed, hemp, flax, pumpkin and chia seeds, nuts, avocados, and leafy greens.
- Potassium – found in potassium chloride, avocados, bone broth, spinach, broccoli, mushrooms, leafy greens, zucchini, beef, and pork.
If you are unable to get enough electrolytes from food, you can also take supplements. However, it is important to be cautious and not take more than the recommended daily amount. It is also important to consult your doctor before increasing your salt intake, especially if you have certain health conditions such as high blood pressure or congestive heart failure.
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Dehydration and an electrolyte imbalance can cause similar symptoms
- Headaches
- Nausea
- Irregular heartbeat
- Muscle cramps
- Numbness or tingling
- Low or high blood pressure
- Arrhythmia
- Confusion or cognitive difficulties
- Dry mouth and thirst
It is important to note that severe electrolyte imbalances can result in serious complications, such as seizures, coma, and cardiac arrest. Therefore, if you are experiencing any of these symptoms, it is crucial to seek medical advice.
To restore electrolyte balance, one can increase their intake of foods rich in electrolytes, such as nuts, seeds, fish, dairy, and leafy greens. Additionally, staying hydrated is essential, but it is important not to over-hydrate, as this can dilute blood sodium levels and worsen the electrolyte imbalance.
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Frequently asked questions
Electrolytes are essential minerals that regulate water distribution to the cells, keeping you hydrated. They also regulate muscle contractions, control nervous system function, balance blood pressure, rebuild damaged tissue, and carry messages to cells.
Symptoms of an electrolyte deficiency, also known as "keto flu", include brain fog, dizziness, diarrhoea, digestive discomfort, change in blood pressure, skin rash, and sensitivities.
Foods high in electrolytes that are suitable for a keto diet include bone broth, leafy greens such as spinach and kale, nuts and seeds (e.g. hemp seeds, chia seeds, and almonds), fish (e.g. salmon and sardines), and avocado.
The different types of electrolytes include sodium, potassium, calcium, magnesium, chloride, and phosphate/phosphorus. Sodium is important for blood pressure and muscle contractions; potassium flushes out excess sodium and prevents muscle cramps; calcium plays a role in vascular contraction and bone health; magnesium is involved in nerve function, energy production, and blood pressure regulation; chloride balances fluid inside and outside cells; and phosphate/phosphorus is required for the formation of bones and teeth.
To ensure you're getting enough electrolytes on a keto diet, consider adding salt to your food, drinking bone broth, including leafy greens and other green vegetables in your meals, snacking on nuts and seeds, and choosing electrolyte-rich proteins like meat and fish. You can also supplement with keto-friendly electrolyte drinks or powders.