What Are the Symptoms of Selenium Deficiency?
Selenium is an essential trace element for the human body. It promotes cellular metabolism and helps delay aging, playing a critically important role in maintaining human health. Additionally, selenium exhibits anticancer properties—by neutralizing carcinogenic free radicals in the body, it effectively helps prevent cellular malignant transformation. So, what are the symptoms of selenium deficiency? The following section addresses this question.

What Are the Symptoms of Selenium Deficiency?
1. Irritability and Anger
Selenium deficiency may manifest with neurological symptoms such as irritability, anger, anxiety, poor sleep quality, and insomnia. Endocrine-related manifestations include diminished immune function, reduced resistance to disease, and premature ovarian failure in women. Furthermore, selenium deficiency can lead to cardiac conditions—including bradycardia, arrhythmia, heart failure, and impaired cardiac function—seriously endangering health. It also significantly increases cancer risk, thereby posing a severe threat to life.

2. Loss of Appetite
A common symptom is diminished or absent appetite. Selenium deficiency adversely affects the digestive system, frequently resulting in loss of appetite. This severely impairs nutrient absorption; if left untreated, it may even progress to malnutrition. Additional manifestations include alopecia (hair loss) and onycholysis (nail separation), which not only harm physical health but also significantly affect appearance. Moreover, weakened mucosal barrier and defense functions in the respiratory tract predispose individuals to upper respiratory tract infections.

3. Dull, Yellowish Skin
Selenium deficiency significantly impacts skin health—particularly in women, who may develop dull, yellowish, lackluster skin and even various dermatological conditions, substantially affecting quality of life. Additionally, immune function declines, compromising overall health and increasing susceptibility to minor illnesses in daily life. This condition also markedly elevates the risk of gynecological disorders, seriously threatening women’s physical and mental well-being.
The above outlines the primary symptoms associated with selenium deficiency. We hope this information proves helpful to you.