Selenium-containing foods in nature mainly include seafood, mushrooms, meat, eggs, and some vegetables. However, these are not particularly rich in selenium, so if you need to take a selenium supplement, you can do so by purchasing some selenium-fortified substances. Selenium is a trace element, in the body’s content is not very high, but the lack of is not, lack of selenium may cause alopecia and loss of armor, neurological damage symptoms and so on. Therefore, you should eat some selenium-containing foods, which are mainly divided into the following categories. 1. Seafood, mainly fish and shrimp, such as squid, sea cucumber, cuttlefish, oysters. 2. Meat, such as beef, mutton, pork, animal offal. 3. All kinds of poultry eggs, such as eggs, duck eggs, quail eggs. 4. Some vegetables, such as broccoli, purple potatoes, garlic, etc. 5. Some beans, such as red beans, green beans, black beans. However, the specific amount of selenium is still related to the selenium content in the local soil, if you want to supplement selenium you can eat some specialized nutrient-enhanced foods. For example, selenium-enriched rice, selenium-enriched eggs and so on, or you can take selenium yeast orally to supplement. Whether you need to supplement selenium, you need to go to the hospital for some laboratory tests and follow the doctor’s instructions.