What is chloride deficiency and how much chloride do you need every day?
Chloride is an important electrolyte that, together with sodium, helps to regulate fluid and electrolyte balance in the body. It plays a crucial role in maintaining osmotic pressure, acid-base balance and the excitability of nerves and muscles. A chloride deficiency, also known as hypochloraemia, occurs when the chloride concentration in the blood falls below the normal range of 96-106 mmol/l.
The recommended daily chloride requirement for adults is around 2.3 grams per day. However, this value can vary depending on individual factors such as age, gender and state of health. As a rule, the chloride requirement is covered by a balanced diet, as chloride occurs naturally in many foods.
Chloride deficiency symptoms
A deficiency of chloride can cause various symptoms, which can vary depending on the severity and duration of the deficiency. The most common signs of chloride deficiency include:
- Fatigue and weakness: A low chloride level can lead to a lack of energy and rapid fatigue.
- Muscle cramps: Chloride is involved in the excitability of nerves and muscles. A deficiency can therefore favour muscle cramps.
- Nausea and vomiting: Disturbances in the electrolyte balance, as they occur with a chloride deficiency, can cause gastrointestinal complaints.
- Confusion and disorientation: In severe cases, a chloride deficiency can affect the central nervous system and cause cognitive disorders.
- Dehydration: A pronounced chloride deficiency can lead to a disturbed fluid balance and consequently to dehydration.
It is important to note that many of these symptoms are non-specific and can also occur in other diseases. An accurate diagnosis therefore requires a medical examination and laboratory analyses.
Causes of chloride deficiency
A chloride deficiency can have various causes. The most common causes of hypochloraemia include:
- Excessive loss through sweat: Significant amounts of chloride can be lost through the skin during heavy sweating, for example due to intense physical activity or high ambient temperatures.
- Diarrhoea and vomiting: Gastrointestinal disorders associated with frequent diarrhoea or vomiting can lead to a significant loss of chloride and other electrolytes.
- Kidney disease: Certain kidney diseases, such as Bartter syndrome or Gitelman syndrome, can impair the kidneys' ability to reabsorb chloride, leading to increased excretion and deficiency.
- Medications: Some medications, especially certain diuretics (diuretics), can increase chloride excretion via the kidneys and thus favour a deficiency.
- Insufficient intake: Although rare, insufficient intake of chloride-rich foods over a longer period of time can also lead to a deficiency.
A careful medical history and physical examination by a doctor can help identify the underlying cause of a chloride deficiency and initiate appropriate treatment.
Chloride in food
Vegan sources of chloride (per 100 g)
- Food salt: 60,000 mg
- Soy sauce: 6,000 mg
- Olives (green, in brine): 2.000 mg
- Celery: 640 mg
- Chard: 580 mg
- Artichokes: 450 mg
- Parsley: 400 mg
- Spinach: 380 mg
- Carrots: 350 mg
- Tomatoes: 300 mg
Animal sources of chloride (per 100 g)
- Anchovies (in oil): 10.000 mg
- Ham (raw): 2,500 mg
- Salami: 2,200 mg
- Herring (in brine): 2,000 mg
- Parmesan: 1,600 mg
- Edam cheese: 1,200 mg
- Eggs (boiled): 680 mg
- Milk (3.5% fat): 450 mg
- Yoghurt (3.5% fat): 450 mg
- Salmon (smoked): 400 mg
It should be noted that many chloride-rich foods, especially processed products and cheese, are also high in sodium. Excessive sodium intake can increase blood pressure in some people and increase the risk of cardiovascular disease. It is therefore advisable to limit the consumption of foods with a high salt content and instead opt for natural, less processed sources of chloride such as vegetables. A balanced diet with moderate salt and sodium consumption is key to meeting chloride needs while promoting health.
Drinking food against chloride deficiency
In addition to a balanced, chloride-rich diet, special drinking meals can also help to cover the chloride requirement and prevent a deficiency. Manufacturers such as Saturo offer Astronaut Nutrition, which contains an optimised nutrient combination including chloride.
Such drinkable meals can be a particularly useful supplement for people with an increased chloride requirement, such as competitive athletes, people with heavy sweating or patients with diarrhoeal diseases. They are a practical and tasty option for stabilising the chloride level in the blood and counteracting deficiency symptoms.
The intake via a drinking diet enables a controlled and even intake of chloride without the need to consume large quantities of salt-rich solid food. This can be particularly beneficial in the case of unbalanced diets, frequent vomiting or diarrhoea or after electrolyte losses due to heavy sweating.
Frequently asked questions
What happens if there is too little chloride in the body?
If there is a chloride deficiency, the fluid and electrolyte balance in the body can become unbalanced. This can lead to symptoms such as tiredness, muscle weakness, nausea and, in severe cases, even neurological disorders.
Which foods contain chloride?
Chloride is found naturally in many foods, particularly in table salt (sodium chloride), dairy products, eggs, meat and seafood. Some vegetables such as celery, tomatoes and spinach also contribute to chloride intake.
Is salt and chloride the same thing?
Food grade salt (sodium chloride) consists of the elements sodium and chloride in a ratio of 1:1. While chloride is an essential mineral for the body in its own right, the term "salt" usually refers to the combination of sodium and chloride.
You might also be interested in this
Sources
- German Society for Nutrition (DGE). (2020). Reference values for nutrient intake. 2nd edition.
- Institute of Medicine. (2005). Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate. National Academies Press.
- Robert Koch Institute (RKI). (2016). Chloride deficiency and hypochloraemia.
- MedlinePlus. (2022). Chloride in diet.
- European Food Safety Authority (EFSA). (2019). Scientific Opinion on the adequate intake of chloride.
- World Health Organisation (WHO). (2018). Sodium and chloride intake.
- Kasper, H. (2017). Nutritional medicine and dietetics. 12th edition. Elsevier.
- Biesalski, H. K. (2018). Nutritional science. 4th edition. Thieme.
- Fuchs, G. (2019). Nutrition and Health. 2nd edition. Springer.
- Loth, G. (2018). Chloride: An overview of current research. Nutrition Review, 65(10), 148-155.
- National Institutes of Health (NIH). (2022). Chloride: Fact Sheet for Health Professionals.
- European Commission. (2019). Nutrition and health claims made on foods.
