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Selenium's unique role in human health
Selenium can improve the oxygen-carrying capacity of red blood cells, lower blood sugar in diabetics and regulate insulin metabolism, Ruan Guangfeng of China Food Information Center told S&T Daily, adding that, "Selenium is an essential trace element rich in antioxidant properties."
Selenium is one of the essential trace elements and is involved in the antioxidant process of the organism, according to the Dietary Reference Intakes for Chinese Residents published by the Chinese Nutrition Society. It also noted that selenium deficiency is associated with Keshan disease (KD), a fatal cardiomyopathy, and the clinical manifestations of patients with KD are mainly congestive heart failure, acute heart failure, and cardiac arrhythmias.
Eating selenium-rich fruits and vegetables to supplement selenium
Eating selenium-rich fruits and vegetables is an effective way to supplement selenium. Ruan said that in daily life, there are many natural foods rich in selenium, such as meat, eggs, fish, seafood and animal organs. Some vegetables, such as capers, asparagus, peas, cabbage, squash, onions and tomatoes, also contain a certain amount of selenium, and eating more of these foods can safely and effectively replenish selenium.
Overdose selenium may cause adverse consequences
A moderate amount of selenium is beneficial to the human body, but an overdose is harmful. Zhai Fengying, executive vice president of the Chinese Nutrition Society, said that long-term consumption of foods containing excessive amounts of selenium can be toxic, causing hair loss, nail deformation, nausea, vomiting, irritability, fatigue and so on.
Zhai also noted that determining whether the body is deficient in selenium is a complex process that requires detailed biochemical tests, and selenium supplementation may lead to adverse consequences. It is recommended to consult the nutrition department of a regular hospital before taking selenium supplements.