Have you heard the word 'electrolytes' before? You've probably heard it when you're working up a sweat after exercising, or when someone is sick and dehydrated. What exactly are these electrolytes? Why do our bodies need them? Let's talk about this in detail, very simply.
What are electrolytes? Simply put...
Think about it, electrolytes are tiny things that, when dissolved in water, create a small electrical charge (or something like a small current). Some of these things take on a positive (+) charge, and some take on a negative (-) charge. Our bodies, in the case of an adult, are about 60% water. That means that every cell in the body, almost every fluid, contains these electrolytes. These are what help our body's chemical reactions to proceed properly, keep the fluids inside and outside the cells in balance, and do many other things.
We get these electrolytes from the food we eat and drink. Our kidneys excrete excess electrolytes through urine. Electrolytes are also lost from our bodies when we sweat.
It's easy if you remember these words too!
There are a few words we often hear when talking about these electrolytes. If you understand them simply, you can easily understand even something a doctor says.
- Hyper- : When this word comes before it, it means there is too much of something. For example, if there is too much sodium, it is called `Hypernatremia`.
- Hypo- : When this word comes first, it means that there is a deficiency of something. For example, low sodium is called `Hyponatremia`.
- Ion : This refers to an atom that has an electrical charge. It's like a small battery.
- Cations : These are ions that have a positive (+) electrical charge.
- Anions : These are ions that have a negative (-) electrical charge.
- pH (pH) : This measures whether a liquid is acidic (like acid), basic (like soap), or neutral (like water). The normal `pH` of our blood should be between 7.36 and 7.44.
- Acidic : If the pH value is less than 7.
- Neutral : If the `pH` value is exactly 7.
- Basic/Alkaline : If the `pH` value is greater than 7. Basic is also called "alkaline".
What do electrolytes actually do to our bodies?
The cells in your body use these electrolytes to handle electrical charges. These electrical charges are what make your muscles contract and stretch. Think about it, when you move your arm, when you close your eyes, when your heart beats – these electrolytes are very important for all of these things.
Not only that, but these electrical charges also help with chemical reactions. In particular, electrolytes are essential for the body's ability to absorb water (hydration) and maintain a balance between the amount of fluid inside and outside the cells.
To give a simple example, take salt water. Electricity flows through salt water, right? The reason for this is that salt is made up of sodium (which is positively charged) and chlorine (which is negatively charged). When these two are combined, the charges balance out. But when salt dissolves in water, the sodium and chlorine atoms separate and become ions with positive and negative charges again. Then the electricity flows between these sodium and chlorine ions, not between water molecules.
The same thing happens inside our bodies. Electrolytes help move chemicals into and out of our cells. In other words, electrolytes are like little heroes who keep our bodies balanced.
What are the most important electrolytes for our body?
There are several essential elements that are essential for maintaining proper electrolyte levels in our bodies. Let's now look at these key elements and what happens if they become too high (Hyper-) or too low (Hypo-) in the body.
Sodium (+)
Sodium is a very important substance that helps maintain the proper amount of fluid inside cells. It also helps cells absorb nutrients. Sodium is the most abundant electrolyte ion in our bodies.
- Hypernatremia : This can cause confusion, behavioral changes, loss of muscle control, seizures , and even coma.
- Sodium deficiency (Hyponatremia) : This can also cause confusion, irritability, muscle weakness, nausea, vomiting, seizures , and even coma.
Magnesium (+)
Magnesium helps cells convert nutrients into energy. Magnesium is important for your brain and muscles to function properly.
- Hypermagnesemia : Heart rhythm irregularities (Arrhythmias), muscle weakness, breathing difficulties, and cardiac arrest may occur.
- Magnesium deficiency (Hypomagnesemia) : Muscle weakness, cramps, loss of control, and irregular heartbeats (arrhythmias) can occur. This often occurs in conjunction with calcium and potassium deficiencies.
Potassium (+)
Cells use potassium along with sodium. When a sodium ion enters a cell, a potassium ion leaves. That's how it is. Potassium is especially important for the functioning of your heart. Too much or too little of it can cause serious heart problems.
- Increased potassium (Hyperkalemia): Lifeless body, inability to move muscles, loss of consciousness, and irregular heartbeats (arrhythmias) may occur.
- Low potassium (Hypokalemia) : Symptoms include muscle weakness, back pain, frequent urination, dizziness when standing, and fainting. If this becomes too high, muscle tissue can begin to break down (a condition called rhabdomyolysis, which can cause serious kidney damage) and dangerous heart rhythm disturbances (arrhythmias).
Calcium (+)
When we think of calcium, we think of it as something that strengthens teeth and bones. That's true. But calcium is needed for many more things than that. Calcium is also essential for things like controlling muscles, transmitting messages through nerves, and controlling the heartbeat. Whether calcium in the blood is high or low, it can cause a number of symptoms that affect various systems in the body.
Increased calcium (Hypercalcemia)
- Brain : Headache, fatigue, lack of interest, confusion.
- Digestive system : constipation, stomach ache, vomiting.
- Kidneys : Frequent urination, kidney stones, kidney failure.
- Heart : Heart rhythm irregularities (Arrhythmias) (some can be severe).
- Musculoskeletal system : Pain in bones and joints.
Low calcium (Hypocalcemia)
- Brain : Disturbances of consciousness, changes in behavior.
- Muscles : Tight muscles, loss of control, muscle spasms, difficulty speaking and breathing due to tightness in the throat muscles.
Chloride (-)
Chloride (the name given to the chlorine ion) is the second most abundant ion in the body. It is also very important for maintaining fluid balance inside and outside the cells. It also helps maintain the body's natural `pH` balance.
- Hyperchloremia : This can cause a condition called acidosis (increased acidity in the blood). This can cause nausea, vomiting, fatigue, rapid, deep breathing, and confusion. This is usually associated with an increase or decrease in potassium.
- If associated with increased potassium: Severe kidney problems or kidney failure may occur.
- Potassium deficiency can cause diarrhea, pancreatic fluid leakage, and other serious urinary tract problems.
- Hypochloremia : This causes the blood to become too alkaline (alkalosis). This usually occurs with hyponatremia or vomiting. Symptoms may include apathy, confusion, arrhythmias, muscle twitching, or loss of control.
Phosphate (-)
Phosphate is a molecule containing phosphorus. It is important for transporting chemicals and molecules out of cells. It helps cells metabolize nutrients. It is also a key part of the molecules called nucleotides that make up our DNA.
- Hyperphosphatemia : This usually occurs with hypocalcemia, as the body tries to use calcium instead of phosphorus. Symptoms may not appear until it is severe. Symptoms of calcium deficiency may also occur with this. Excessive scratching may also be associated with this.
- Hypophosphatemia : The first symptom of this is muscle weakness. As the condition worsens, more serious symptoms such as rhabdomyolysis (muscle breakdown, which can cause severe kidney damage), seizures , decreased heart function, and difficulty breathing (due to muscle weakness) can occur.
Bicarbonate (-)
Not all of the carbon dioxide our bodies produce goes to the lungs and is exhaled. Some is reused to make bicarbonate. This bicarbonate is what helps maintain the pH of our blood.
- Acidosis : If bicarbonate levels decrease, the blood becomes acidic. This can cause fatigue, nausea, vomiting, rapid, deep breathing, and confusion.
- Alkalosis : If bicarbonate levels increase, the blood becomes alkaline. This can cause confusion, apathy, irregular heartbeats (arrhythmias), and muscle cramps.
What tests help detect electrolyte problems?
There are various laboratory tests that can be used to diagnose electrolyte imbalances. The first test that is usually done is a general test, such as a metabolic panel. If the results are abnormal, your doctor may order more specialized tests. These tests are important because they can help determine the cause of the electrolyte imbalance and provide the right treatment.
Broader tests
These are blood tests:
- Basic Metabolic Panel (BMP) : This looks at various processes in the body.
- BUN (Blood Urea Nitrogen). This can give an idea of kidney function and dehydration.
- Fluid balance and electrolyte levels like sodium, potassium, carbon dioxide, and chloride.
- Blood sugar level. If done while fasting, it can indicate diabetes or prediabetes.
- Comprehensive Metabolic Panel (CMP) : This is similar to the `BMP`, but more data is collected.
- Calcium levels.
- Albumin (a protein produced by the liver) levels.
- Total blood protein levels.
- Bilirubin (a chemical produced in the liver).
- Enzyme levels called aspartate aminotransferase (AST) and alanine aminotransferase (ALT) (these are related to liver function).
- Electrolyte Panel : This is similar to the `Metabolic Panels` mentioned above, but this only looks at electrolytes. It analyzes sodium, chloride, potassium, and bicarbonate.
More specific tests
Some more specific tests for electrolyte issues:
- Aldosterone blood test: This tests for a special hormone produced by the kidneys.
- Anion gap blood test: Compares the levels of positively and negatively charged electrolytes.
- Antidiuretic Hormone test (blood) / ADH test: This hormone is tested.
- Carbon dioxide blood test: Measures the amount of carbon dioxide in the blood.
- Separate blood and urine tests for various electrolytes (chloride, magnesium, phosphorus, sodium).
- Blood osmolality test: This is done if dehydration, overhydration, or poisoning is suspected .
- Urine osmolality test: Checks fluid balance.
- Urine concentration test: This tests the function of the kidneys.
What will the test report I receive be like?
Many lab reports include a "reference range" with your results. This has an upper and lower limit. If your result is between these two limits, it is considered a "normal" result.
These results are usually given in terms of "how much of the substance in question is present in a sample."
- Millimoles (mmol/L) : This is the most commonly used unit.
- Milliequivalents (mEq/L) : This is also sometimes used.
- Milligrams per deciliter (mg/dL) : This is used for some large molecules.
Although these units of measurement may seem a bit complicated, your doctor will understand them well. The most important thing is whether your results are within the normal range or outside it.
What are the normal ranges for electrolyte levels?
Each electrolyte has a normal range for blood and urine. These ranges can vary slightly from lab to lab. They can also vary depending on your age and health. So, it's best to talk to your doctor to get an accurate reading on your results.
Is everything good if a normal result comes back? Is an abnormal result always a problem?
This is a very important question. Not everyone is the same. Sometimes your results may be slightly out of the normal range, but you may not have any problems. Other times, even if the results are normal, your symptoms and other tests may indicate that you have a health problem.
Think of someone in a circus spinning a plate on a pole. If the plate leans too much to one side, it will fall over. Balance is very important. Your electrolyte levels and test results depend on that kind of balance. Our bodies are always trying to maintain this balance as best they can. Sometimes, the body can help one system by helping another, and a problem can be hidden so that it doesn't show up on the surface. A doctor will do a series of tests to see if the body is hiding one problem and creating another.
When will I know the test results?
Your doctor or his or her staff can tell you how long it will take to get your test results. Some tests give results quickly, while others may take several days.
When should I call my doctor?
- If you don't understand your test results.
- If a result is outside the normal range, you have questions or concerns about it.
- If you experience a sudden change in symptoms related to your electrolyte levels.
In a situation like this , it's wise to talk to the doctor without wasting time.
Take-Home Message
Electrolytes are essential for the functioning of our bodies. They affect everything from how we absorb water to how our heart beats. Electrolyte tests also help doctors diagnose various diseases and health problems.
So, being aware of electrolytes and the problems that can arise with them will help you take care of yourself and avoid future health problems. That way, you can keep your electrolyte levels in check and live a healthy life. Got it? If you have any more questions about this, don't be afraid to ask your doctor.
👩🏽⚕️ Additional questions (FAQs)
💬 What are 'electrolytes' in our bodies?
Our bodies need a small amount of electricity to function. There are five main minerals that carry an electrical charge and are dissolved in our blood and fluids. These are called electrolytes.
💬 How do you tell if these electrolytes are low?
If we have severe diarrhea, excessive vomiting, or sweat a lot in extreme heat, the sodium and potassium in our bodies are completely removed from the body along with the water.
💬 What happens if potassium levels suddenly drop?
Our heart rate is controlled by this potassium. Therefore, if the body's potassium levels decrease, muscles can become tense (Cramps), and the heart rhythm can change (Arrhythmia) and a person can even die suddenly. Things like ORS are given to quickly replace these depleted levels.
` Electrolytes, sodium, potassium, calcium, magnesium, body fluids, electrical charge











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