Selen

Selenium is an essential trace element that can support the body in maintaining immune system and cell function. It is valued in high-quality dietary supplements and as part of a balanced diet.

Selenium: An essential trace element for health and wellbeing

Selenium is an essential trace element that plays a crucial role in numerous processes within the human body. It helps to support the immune system, cell protection and thyroid function. Although the daily requirement is low, a selenium deficiency has a significant impact on health. But what exactly are the benefits of selenium, and how can you ensure an adequate intake? Below you will find all the key information about selenium and its importance for our bodies.

What is selenium?

Selenium is a chemical element with the symbol Se and is one of the trace elements that the human body requires only in small quantities. It occurs naturally in soil, water and food. Although the body cannot produce selenium itself, it is essential for a wide range of biological functions. Its antioxidant properties, in particular, make it a key component of our diet.

The most important functions of selenium in the body

Selenium is involved in numerous vital processes. Here is an overview of its main functions:

Protection against oxidative stress: Selenium is a component of various enzymes, including glutathione peroxidase. These enzymes protect cells from free radicals, thereby preventing cell damage.
Supporting the thyroid: Selenium plays a key role in regulating thyroid hormones. It supports the conversion of thyroxine (T4) into its active form, triiodothyronine (T3).
Strengthening the immune system: Selenium contributes to the functioning of the immune system by supporting the production of white blood cells and acting as an anti-inflammatory.
Promoting fertility: Selenium is particularly important for men, as it can improve sperm quality.

Benefits of an adequate selenium intake

A balanced intake of selenium is essential to optimally support the functions mentioned above. The most important health benefits include:

Protection against diseases such as cancer, cardiovascular conditions and inflammation
Support for cognitive function and prevention of neurodegenerative diseases
Improved skin health and wound healing
Improved overall vitality and energy

Foods high in selenium

To meet your daily selenium requirements, it is important to include suitable foods in your diet. Foods particularly rich in selenium include:

Brazil nuts: These are considered the best natural source of selenium.
Fish and seafood: Tuna, salmon and prawns contain high levels of selenium.
Meat and offal: Beef and liver in particular are rich in selenium.
Eggs: Eggs also contribute to selenium intake.
Cereal products: Wholemeal products and wheat germ are good plant-based sources.

The selenium concentration in plant-based foods can vary depending on the growing region, as it is heavily dependent on the selenium content of the soil.

Selenium deficiency: causes and effects

A selenium deficiency can have serious health consequences. The most common causes of selenium deficiency include a diet low in selenium, certain medical conditions such as bowel disorders, or the body’s reduced ability to absorb selenium. Symptoms of selenium deficiency include:

Weakness and tiredness
Hair loss and brittle nails
Disorders of thyroid function
Weakening of the immune system

In severe cases, a deficiency can even lead to heart muscle disease or an increased susceptibility to infections.

How much selenium do we need?

The recommended daily intake of selenium varies depending on age, gender and lifestyle. For adults in Switzerland, the guideline is around 60 to 70 micrograms per day. Pregnant and breastfeeding women have a slightly higher requirement. It is important not to exceed the recommended amount, as an overdose can also be harmful to health.

Selenium supplements: when are they advisable?

In some cases, taking selenium supplements may be advisable, particularly if dietary intake is insufficient to meet selenium requirements. This may be the case under specific circumstances such as pregnancy, a weakened immune system or certain medical conditions. However, you should always consult a doctor or nutritionist before taking dietary supplements to avoid an overdose.

Tips for an optimal selenium intake

To prevent both a selenium deficiency and an overdose, you should follow these tips:

Include selenium-rich foods in your diet on a regular basis.
Avoid an unbalanced diet, which can disrupt your nutrient balance.
If you have any concerns or symptoms, consult an expert to determine your individual requirements.

Conclusion: The importance of selenium for health

Selenium is an essential trace element that offers numerous health benefits. It protects cells, supports the thyroid, strengthens the immune system and contributes to fertility. A balanced diet rich in selenium-rich foods is the best way to meet your daily requirements. In specific cases, dietary supplements can be a useful addition. Make sure to maintain a balanced selenium intake to benefit from the positive effects of this essential trace element.

Frequently Asked Questions

What is selenium and what is it needed for?

Selenium is an essential trace element that is needed for immune system function and to protect cells from oxidative stress. It also contributes to normal thyroid function. Because the body cannot produce it itself, it must be obtained through food.

Which foods contain selenium?

Selenium is found in foods such as fish, eggs, Brazil nuts and cereal products. The exact amount, however, depends on the composition of the soils on which the plants grow. Meat and dairy products can also contain selenium.

What happens in case of selenium deficiency?

A selenium deficiency can weaken the immune system and lead to muscle weakness or fatigue. In the long term, problems with thyroid function could also occur. A balanced diet helps prevent a deficiency.

Can an overdose of selenium be harmful?

Yes, excessive intake of selenium, for example through dietary supplements, can lead to symptoms such as hair loss or nausea. An overdose should be avoided by following the recommended daily dose. If in doubt, it is advisable to consult a specialist.

Are there groups of people who have an increased need for selenium?

An increased need for selenium can occur in people with special diets or certain medical conditions. People who live in regions with selenium-poor soils may also be affected. In such cases, an individually adjusted intake can be useful.

How can selenium be taken through dietary supplements?

Selenium is available as a dietary supplement in various forms, such as selenomethionine or selenium yeast. Such preparations can enable targeted intake, but should only be used after consulting a specialist. A balanced diet remains the best source, however.