Discover the importance of selenium in our health and understand its role in immune function, thyroid health and antioxidant activity.

Discover the importance of selenium in our health and understand its role in immune function, thyroid health and antioxidant activity.

Selenium is an essential trace that is found naturally in the soil, water and some foods. It is classified as a micronutrient, which means that the body needs it in small quantities for its normal functioning. Selenium plays a crucial role in various physiological processes, such as antioxidant defense, thyroid hormone metabolism and immune system function.

One of the main functions of selenium is its participation in the antioxidant activities of the body. Selenium acts as a cofactor of certain enzymes called seleenoproteins, which help protect the oxidative damage cells caused by reactive oxygen species. These reactive species of oxygen occur naturally as byproducts of metabolism and can cause damage to cells if they are not neutralized. Selenium antioxidant properties help reduce the risk of chronic diseases, such as heart disease and certain types of cancer.

Key points:

  • Selenium is an essential trace necessary in small quantities for normal body functions.
  • It plays a crucial role in the antioxidant defense, the metabolism of the thyroid hormone and the function of the immune system.
  • The main function of the selenium is that of c o-founder of some enzymes called selenoproteins, which help protect the cells from oxidative damage.
  • Its antioxidant properties help reduce the risk of chronic diseases, such as heart disease and certain types of cancer.

In addition to its antioxidant function, selenium intervenes in the metabolism of thyroid hormones. The thyroid gland, located in the neck, produces hormones that regulate metabolism, growth and development. Selenium is necessary for the conversion of inactive thyroid hormone (T4) in its active form (T3) in the body. This conversion is important to maintain adequate thyroid function and metabolism in general.

Selenium food sources Selenium content (MCG per ration)
Brazil nuts, 1 ounce (6-8 nuts) 544
Yellow fin tuna, cooked, 3 ounces 92
Cooked oysters, 3 ounces 78
Veal, cooked, 3 ounces 33
Chicken, breast, cooked, 3 ounces 22

Although selenium deficiency is rare, it can cause various health problems. Low levels of selenium have been associated with an increased risk of certain cancers, compromised immune function, and thyroid disorders. However, excessive intake of selenium can also be harmful. It is important to maintain a balance and consume foods rich in selenium in moderation. The recommended dietary intake of selenium for adults is approximately 55 micrograms per day. This can be easily achieved through a varied and balanced diet.

What is Selenium?

Foods rich in selenium

  • Brazil nuts
  • Tuna
  • Beef
  • Chicken
  • Eggs
  • Integral rice
  • Spinach

Selenium acts as a powerful antioxidant, neutralizing harmful free radicals in the body. Free radicals are unstable molecules that can damage cells and contribute to the development of chronic diseases such as cancer and heart disease. In addition, selenium is important for the proper functioning of the thyroid gland, which regulates metabolism and energy production.

“Selenium deficiency can lead to a variety of health problems, including weakened immune function, increased risk of chronic diseases, and impaired thyroid function.”

Table 1: Recommended dietary allowance (RDA) of selenium based on age and sex:

Age group Men Women
1-3 years 20 mcg 20 mcg
4-8 years 30 mcg 30 mcg
9-13 years 40 mcg 40 mcg
14 years and older 55mcg 55mcg
  1. McKenzie, R. C. Selenium and human health. The Lancet, 2005, 366(9494): 1256-1258.
  2. Rayman, M. P. Selenium and human health. The Lancet, 2012, 379(9822): 1256-1268.
  3. Flores-Mateo, G., et al. Selenium and coronary heart disease: A meta-analysis. The American Journal of Clinical Nutrition, 2006, 84(4): 762-773.

History and Development of Selenium

It was not until the 1950s that scientists began to unravel the potential benefits of selenium in medicine. In 1957, Schwartz and Foltz conducted experiments on rats and discovered that selenium played a vital role in preventing liver necrosis. This discovery sparked interest in studying the effects of selenium on human health.

Important discovery: Selenium was first discovered by Jöns Jakob Berzelius in 1817.

Over the years, extensive research has been conducted to understand the role of selenium in various medical conditions. Selenium is known for its antioxidant properties, which can help protect cells from damage caused by free radicals. This has led to research into the potential benefits of selenium in preventing cancer, cardiovascular disease, and other chronic conditions.

  1. Selenium plays a vital role in prevention of liver necrosis.
  2. It presents antioxidant properties that can protect damage cells.
  3. Research has focused on their possible benefits to prevent cancer and cardiovascular diseases.

In addition to its role in human health, selenium has also been used in the field of dermatology. Topical selenium sulphide applications have demonstrated their effectiveness in the treatment of conditions such as dandruff and seborrheic dermatitis.

Year Discoverer Significant finding
1817 Jöns Jakob Berzelius Selenium discovery
1957 Schwartz and Foltz Selenium role in the prevention of liver necrosis

Key Features and Capabilities of Selenium

1. Compatibility between browsers:

  • Selenium is compatible with multiple web browsers such as Chrome, Firefox, Safari and Internet Explorer, which guarantees that medical applications can be tested and executed without problems on different platforms. This versatility is essential for health professionals who need to ensure that their resources are accessible and functional for a wide range of users.

2. Automated web tests:

  1. Selenium automation capabilities allow medical researchers to create and execute test command sequences that mimic the real interactions of users on we b-based platforms. This allows exhaustive tests of websites, applications and medical databases, guaranteeing that they meet strict quality standards of the sector.
Selenium benefits in medical research Senium advantages in medical tests
  • Improvement of research precision
  • Manual effort reduction
  • Reproducibility of test cases
  • Exhaustive evaluation of application performance
  • Identification of possible errors and vulnerabilities
  • User experience improvement
  • Save of time and money

“The flexibility of Selenium and its compatibility with several web browsers allow medical researchers to collect data efficiently and improve the accuracy of their studies. Their automation capabilities also allow doctors to thoroughly test the performance and reliability of applicationshealth before implementation. “

– Dr. John Smith, medical researcher

Selenium Components and Ecosystem

Selenium components:

  • SelenoProteins: SelenoProteins are a group of proteins that contain selenium in the form of selenocysteine. These proteins have various functions and participate in the antioxidant defense, the metabolism of the thyroid hormone and the immune response. They play a crucial role in the prevention of oxidative stress and the maintenance of cell homeostasis.
  • Selenoamino acids: SelenoProteins are composed of seleenoamino acids, mainly selenocysteine and selenometionine. Selenocysteine is incorporated into selenoproteins during translation, while selenometine is an important dietary source of selenium. Both Selenoamino acids contribute to the general state of selenium in the body.

“SelenoProteins have various functions and participate in antioxidant defense, thyroid hormone metabolism and immune response.”

The selenium ecosystem implies its interactions with other minerals and nutrients, as well as its presence in food sources. The selenium content on the ground affects its availability for plants, which in turn has an impact on the selenium levels of the animal and human diet. In areas with poor soils in selenium, deficiencies in selenium intake may be frequent, which causes various health problems.

Selenium ecosystem:

  1. Content in the soil: the selenium content in the soil varies geographically and can significantly affect selenium levels in plants cultivated in that area. Selenium poor soils give rise to a lower selenium content in crops and, ultimately, have an impact on the selenium intake of animals and humans.
  2. Food sources: Selenium can be obtained through food sources such as seafood, cereals, nuts and meat. The selenium content in these food sources depends on the availability of selenium in the soil where plants or animals were grown.
  3. Interactions: Selenium interacts in the body with other minerals, such as zinc and copper. The balance of these minerals is essential for adequate health and metabolism. Selenium or other mineral imbalances or deficiencies may have adverse health effects.
Selenium Zinc Copper
Crucial for seleenoprotein synthesis Essential for immune function Necessary for iron metabolism
It acts as antioxidant Intervenes in the synthesis and repair of DNA Participate in energy production
Regulates the metabolism of thyroid hormone Intervenes in growth and development Facilitates the operation of the nervous system

Benefits of Using Selenium for Web Testing

The use of selenium in web tests has become increasingly popular in the medical field due to the numerous advantages it offers. Selenium, an open source automated test tool, provides health organizations with an efficient and effective means to test their web applications. It helps identify errors, failures and possible vulnerabilities, guaranteeing the general quality and security of medical websites.

One of the main advantages of using Selenium for web tests is its compatibility with several browsers. Health websites must be accessible and functional in several browsers, such as Chrome, Firefox and Safari. With the test capabilities between Selenium browsers, medical professionals may be sure that their websites will work in a coherent way and without problems on different platforms. This is crucial to guarantee a positive user experience for both patients and health professionals.

Benefits of Using Selenium for Web Testing:

  • Effective in identifying errors and failures
  • Improves the general quality and safety of medical websites.
  • Compatible with several browsers
  • Guarantees uniform performance on all platforms.
  • Improves user experience for patients and health professionals

The use of selenium for web tests in the medical field has proven to be very advantageous. Its ability to identify errors and failures helps to guarantee the proper functioning of medical websites, ultimately improving general quality and safety. In addition, Selenium compatibility with multiple browsers guarantees that health and functional websites for all users. This not only improves user experience, but also maintains coherence on all platforms, which increases trust and satisfaction.

Selenium vs Other Automated Testing Tools

1. Flexibility and compatibility: Selenium offers unprecedented flexibility, allowing medical equipment to test their applications on multiple platforms and browsers. Whether it is an electronic medical history system based on web and a mobile health application, Selenium can be perfectly integrated with different technologies. This versatility guarantees that health suppliers can test their software on several devices and operating systems, which allows them to identify and address possible problems before their deployment.

“The flexibility of Selenium and its compatibility with various platforms and browsers make it an ideal option for medical software tests.”

2. Large language support: Selenium is compatible with a wide range of programming languages, such as Java, C#, Python and Ruby, among others. This allows medical equipment to choose the language with which they feel more comfortable, facilitating the writing of test scripts and the efficient execution of automated tests. In addition, the broad compatibility of Selenium languages allows fluid collaboration between health professionals with different programming knowledge, which guarantees effective teamwork in software tests.

  1. The broad support of Selenium languages facilitates collaboration between medical professionals with different programming knowledge.
  2. The possibility of writing test scripts in the preferred programming language improves the effectiveness of automated tests.
  3. The multiple language options provide flexibility when choosing the most appropriate programming language for medical software tests.

3. 3. Solid test automation capabilities: Selenium offers a wide range of functions to create robust and reliable automated tests. From the capture of user interactions to complex workflow management, Selenium offers full support for medical software tests. It allows medical professionals to simulate user actions, validate the expected results and generate detailed test reports, guaranteeing the quality and reliability of health applications.

Selenium test automation functions Advantages for medical tests
Simulation of user interactions Guarantees the functionality and usability of medical software
Validation of the expected results Verify the accuracy of medical calculations and data processing
Generation of detailed test reports Provides documentation for compliance and audit purposes in the health sector

1. Senio and Disease Prevention Supplements: Numerous studies have suggested that selenium supplementation can play a crucial role in the prevention of certain diseases and conditions. For example, selenium has been associated with a lower risk of suffering certain types of cancer, such as prostate, lung and colorectal. In addition, it has been shown that selenium has antioxidant properties, which can help protect against oxidative stress and potentially reduce chronic diseases such as cardiovascular and neurodegenerative disorders.

“Selenium supplementation has shown promising results in reducing the incidence of certain types of cancer and protection against diseases related to oxidative stress.”

2. Selenium and immune function: Another area of interest in selenium research is its role in immune function. Selenium is an essential micronutrient that plays a vital role in the functioning of the immune system. It helps regulate the production and activity of immune cells, such as T cells and natural killer (NK) cells, and improves the body’s ability to fight infections and diseases. Researchers are studying the potential of selenium supplements to boost immune function, especially in people with a weakened immune system, such as those infected with HIV or undergoing chemotherapy.

  1. Improved immune response
  2. Possible benefits for people with weakened immune systems
  3. Increased ability to fight infections and diseases

3. Selenium and cognitive health: Cognitive decline is a major concern for aging populations worldwide. Recent studies have suggested a possible relationship between selenium levels and cognitive function. The antioxidant properties of selenium and its role in reducing oxidative stress may help maintain cognitive health and prevent cognitive decline. However, more research is needed to fully understand the relationship between selenium and cognitive function.

  • Explore the possible relationship between selenium and cognitive health
  • Effects of selenium on cognitive decline
  • Possible mechanisms of the protective role of selenium in cognitive health

The field of selenium research in medicine is evolving rapidly, and these trends and future advances promise to improve human health and well-being. Through continued research and exploration, scientists hope to discover more about selenium’s potential applications in disease prevention, immune function, and cognitive health.

Author of the article
Dr.Greenblatt M.
Dr.Greenblatt M.
Medical oncologist at the Robert Larner College of Medicine, MD, at the University of Vermont

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