What are electrolytes and when should you drink electrolytes?

Electrolytes are extremely important components of our body, playing a key role in maintaining proper water and electrolyte balance and cell function. Although we often do not realise it, electrolytes are essential for the proper functioning of many biological processes, such as nerve impulse conduction, muscle contraction and blood pressure regulation. Understanding the role that electrolytes play and skilfully managing their levels in the body can significantly affect our well-being and health. In this article, we will explain what electrolytes are, what functions they perform, what the symptoms of their deficiency and excess are, and how to maintain their proper levels in the body in order to enjoy full health and energy every day.

What are electrolytes?

Electrolytes - definition and types

Electrolytes are substances dissolved in fluids that help maintain the water and electrolyte balance in the body, supporting vital functions such as hydration, nerve impulse conduction and muscle contractions. The most important electrolytes in the human body include sodium, potassium, calcium, magnesium, chlorides, phosphates and bicarbonates. Each of these ions plays a unique role in metabolic processes, regulating acid-base balance and maintaining adequate fluid volume in the body.

• Sodium (Na+): essential for maintaining water balance, blood pressure, and muscle and nerve function.

• Potassium (K+): essential for nerve and muscle cell function, as well as for maintaining proper acid-base balance.

• Calcium (Ca2+): important for bone and tooth formation, as well as for muscle contraction, blood clotting and enzymatic functions.

• Magnesium (Mg2+): acts as a cofactor in many enzymatic reactions, supports muscle and nerve function, and stabilises the structure of DNA and RNA.

• Chlorides (Cl-): support acid-base balance and are important for stomach function.

• Phosphates (PO4 3-): essential for energy production, bone and tooth formation, and cellular function.

• Bicarbonates (HCO3-): help maintain acid-base balance in the body.

The role of electrolytes in the body

Conduction of nerve impulses

Electrolytes are essential for the conduction of nerve impulses. This mechanism involves the flow of ions through the cell membranes of neurons, which generates action potential. Sodium and potassium are the main ions involved in this process. When a neuron is activated, ion channels open, allowing sodium ions to flow into the cell and potassium ions to flow out. This dynamic movement of ions generates an electrical signal that is transmitted along the axon to the synapse.

Proper functioning of the body

Electrolytes play a key role in maintaining homeostasis, i.e. the stability of the body's internal environment. They are involved in:

• Regulation of osmotic pressure – electrolytes control the flow of water between cells and extracellular spaces, which affects blood volume and pressure.
• Muscle contractions – calcium, sodium and potassium are essential for skeletal, cardiac and smooth muscle contractions.
• Enzymatic functions – magnesium and calcium act as cofactors in many enzymatic reactions, supporting metabolism and energy production.
• pH regulation – bicarbonates and phosphates help maintain acid-base balance, which is crucial for proper enzyme function and cellular metabolism.

Electrolyte deficiency

Symptoms and effects of electrolyte deficiency

Electrolyte deficiency can lead to various clinical symptoms, depending on the type of ion that is lacking:

• Hyponatraemia (sodium deficiency) – can cause headaches, nausea, vomiting, weakness and, in extreme cases, convulsions and coma.
• Hypokalaemia (potassium deficiency) – manifests itself in muscle weakness, cramps, heart rhythm disturbances and constipation.
• Hypocalcaemia (calcium deficiency) – leads to tetany (painful muscle spasms), osteoporosis, blood clotting disorders and heart problems.
• Hypomagnesaemia (magnesium deficiency) – can cause convulsions, muscle spasms, cardiac arrhythmias, as well as mood disorders and depression.

Diagnosis and treatment of electrolyte disorders

How to test electrolyte levels in the body?

Testing electrolyte levels in the body, known as an ionogram, is a key tool in diagnosing and treating electrolyte imbalances. The process involves several steps:

1. Blood sampling - the first step is to take a blood sample from the patient. Blood is usually taken from a vein, typically in the arm, in an outpatient or hospital setting.

2. Laboratory analysis (ionogram) - the blood sample is sent to a laboratory, where an ionogram is performed using specialised analysers. This test determines the concentration of individual electrolytes such as sodium, potassium, chloride, calcium and magnesium.

3. Interpretation of results - the results of the ionogram are interpreted by a doctor, who compares them with reference standards. Deviations from the norm may indicate various electrolyte disorders.

4. Additional tests - in some cases, additional tests may be necessary to better understand the cause of electrolyte disturbances, such as urine analysis, kidney function assessment, hormone tests or diagnostic imaging (e.g. ultrasound, computed tomography).

5. Treatment plan - based on the results of the ionogram, the doctor develops a treatment plan, which may include supplementation of missing electrolytes, dietary changes, treatment of the underlying disease, or modification of medications. Regular monitoring of electrolyte levels is often necessary to ensure the effectiveness of treatment and avoid potential complications.

Regular ionogram testing is particularly important for people with chronic diseases, patients who have undergone major surgery, and athletes, who are at higher risk of electrolyte imbalances. This test enables early detection and effective treatment of any abnormalities, contributing to better health and well-being for patients.

How to avoid electrolyte deficiency? How to replenish electrolytes?

Preventing electrolyte deficiencies is crucial for maintaining health and proper body function. Electrolytes such as sodium, potassium, magnesium and calcium play an important role in many physiological processes, including nerve impulse conduction and muscle contraction. Here are some effective ways to avoid electrolyte deficiency and replenish electrolytes:

• Isotonic drinks - in situations of increased electrolyte loss, such as intense physical exertion, heat or illnesses causing dehydration, it is worth reaching for isotonic drinks. They contain the right proportions of electrolytes and sugars, which ensures rapid hydration and replenishment of missing minerals.

• Dietary supplements – in the event of increased electrolyte requirements or difficulties in obtaining them from food, dietary supplements can be used. Preparations containing magnesium, potassium or calcium are available in the form of tablets, capsules or powders and can effectively replenish deficiencies.

• Regular hydration - drinking enough water is crucial for maintaining electrolyte balance. Water not only hydrates the body, but also helps transport electrolytes to cells. Avoid excessive consumption of alcoholic and caffeinated beverages, which can contribute to dehydration.

• Monitor your health - regular blood tests (including ionograms) can help monitor electrolyte levels and detect any deficiencies early on. People with chronic illnesses, athletes and the elderly should take special care to have regular check-ups.

Products that help replenish electrolytes

Here is a list of foods that are rich in specific electrolytes:

• Sodium: table salt, soups, broths, meat products.

• Potassium: bananas, oranges, avocados, potatoes, spinach, nuts.

• Calcium: dairy products (milk, yoghurt, cheese), broccoli, almonds, sardines, tofu.

• Magnesium: nuts (almonds, cashews), seeds (pumpkin, sunflower), dark chocolate, spinach, avocados, bananas.

• Chlorides: table salt, olives, celery, tomatoes.

• Phosphates: fish, meat, dairy products, eggs, legumes, nuts.

• Bicarbonates: products such as baking soda, as well as fresh fruit and vegetables, help maintain acid-base balance.

Replenishing electrolytes in different situations

Electrolytes for dehydration, heat, hangovers and athletes

In different situations, the body may need additional electrolytes:

• Dehydration - the most common cause of electrolyte deficiency is dehydration. Drinking water and isotonic drinks can help replenish electrolytes quickly.

• Heat - during hot weather, sweating increases, leading to electrolyte loss. It is therefore advisable to drink more fluids, especially those rich in electrolytes.

• Hangovers - after consuming alcohol, the body loses a lot of water and electrolytes, which can lead to a hangover. Isotonic drinks or rehydration solutions can help you get back into shape quickly.

• Athletes - intense physical activity causes increased loss of electrolytes through sweat. It is important for athletes to replenish electrolytes regularly to maintain performance and prevent muscle cramps.

Electrolytes for vomiting and diarrhoea

Vomiting and diarrhoea can lead to significant electrolyte loss, which is particularly dangerous for children and the elderly. In such cases, the following is recommended:

• Use rehydration solutions - rehydration solutions (ORS) available at pharmacies contain the right proportions of electrolytes and glucose to help quickly restore water and electrolyte balance.

• Drinking water with salt and sugar - at home, you can prepare a rehydration solution by dissolving a teaspoon of salt and a teaspoon of sugar in a litre of water.

• Avoiding sweet drinks - sweetened carbonated drinks can worsen dehydration and electrolyte imbalances.

What do electrolytes and isotonic drinks have in common?

Electrolytes and isotonic drinks are closely related because isotonic drinks are specially designed to provide electrolytes in optimal proportions. Due to their composition, isotonic drinks mimic the osmolality of body fluids, which means that they contain the right concentration of electrolytes and sugars. As a result, they are quickly absorbed by the body, making them the ideal choice for hydration during intense physical activity or in situations where we lose a lot of fluids and electrolytes, such as during hot weather or illness.

In short, electrolytes are key ingredients in isotonic drinks, which, thanks to their formula, effectively hydrate the body and replenish lost minerals, thus supporting the optimal functioning of the body.

Sample electrolyte replenishment plan

Depending on the situation, below is a sample electrolyte replenishment plan:

• During physical exercise - you can drink an isotonic drink before training, and during prolonged exercise, drink small portions of water or isotonic drink every 15-20 minutes. After training, it is worth eating a meal rich in electrolytes, e.g. yoghurt with banana and almonds.

• During hot weather - hydrate regularly with water and consume foods rich in electrolytes, such as fruit (watermelon, oranges) and vegetables (celery, tomatoes).

• During and after illness - in case of vomiting or diarrhoea, it is advisable to drink rehydration solutions available in pharmacies, and after the symptoms subside, introduce light meals rich in electrolytes, such as broth, rice, bananas and yoghurt, into your diet.

Electrolytes and supplementation

In some cases, electrolyte supplementation may be necessary:

• Endurance athletes - people who train intensively may need additional electrolyte supplements to prevent muscle cramps and maintain performance.

• Older people - with age, the body has more difficulty regulating water and electrolyte balance, so supplementation may be advisable.

• Patients with chronic diseases - certain conditions, such as kidney disease, may require special electrolyte supplementation as recommended by a doctor.

Electrolyte supplements are available in various forms, such as effervescent tablets, powders to be dissolved in water, and capsules. It is important to choose proven products and consult a doctor or dietitian before starting supplementation.