Selenium Deficiency

Selenium Deficiency: What It Is, Causes, and Effects

What is Selenium Deficiency?

Selenium is an essential mineral for human health. It plays a crucial role in various bodily functions, including thyroid hormone metabolism, immune system function, and protection against oxidative stress.

Selenium deficiency occurs when the body does not get enough selenium from the diet. This can lead to a range of health problems, including:

• Weakened immune function
• Thyroid problems
• Cardiovascular disease
• Cognitive decline
• Cancer

Causes of Selenium Deficiency

The most common cause of selenium deficiency is a diet low in selenium-rich foods. These foods include:

• Seafood (especially tuna, salmon, and sardines)
• Meat (especially organ meats like liver and kidney)
• Poultry
• Eggs
• Dairy products
• Whole grains
• Nuts and seeds

Other factors that can contribute to selenium deficiency include:

• Gastrointestinal disorders that interfere with nutrient absorption
• Kidney disease
• Cystic fibrosis
• HIV/AIDS
• Certain medications, such as chemotherapy drugs

Effects of Selenium Deficiency

Selenium deficiency can have a wide range of effects on the body, including:

• Weakened immune system: Selenium is essential for the proper functioning of the immune system. Selenium deficiency can lead to an increased risk of infections and a reduced ability to fight off disease.
• Thyroid problems: Selenium is involved in the metabolism of thyroid hormones. Selenium deficiency can lead to hypothyroidism, a condition in which the thyroid gland does not produce enough thyroid hormones.
• Cardiovascular disease: Selenium is a powerful antioxidant that helps protect the heart from damage. Selenium deficiency has been linked to an increased risk of cardiovascular disease, including heart attack and stroke.
• Cognitive decline: Selenium is essential for brain health. Selenium deficiency has been linked to an increased risk of cognitive decline and dementia.
• Cancer: Selenium has been shown to have anticancer properties. Selenium deficiency has been linked to an increased risk of certain types of cancer, including lung cancer, prostate cancer, and breast cancer.

If you suspect you may be selenium deficient, it is important to see your doctor for a blood test to confirm the diagnosis. Treatment for selenium deficiency typically involves taking selenium supplements.