Selenium supplementation includes food supplementation, lifestyle supplementation, or medication supplementation, etc. Selenium is one of the essential trace elements in the human body. Selenium is one of the essential trace elements in the human body, and it can improve the body’s resistance. Selenium can also prevent and treat cardiovascular diseases, such as myocardial ischemia. Selenium deficiency may cause symptoms such as pallor and weakness in the limbs. Many foods are rich in selenium, such as animal hearts, livers, kidneys, etc., and some fruits and vegetables also contain selenium, such as cabbage, onions, tomatoes and so on. You can consume the above foods in your regular diet to help replenish selenium. Maintaining a good lifestyle such as going to bed early, waking up early, increasing the duration of deep sleep, and sunbathing every day can help selenium to be digested and utilized in the body. If necessary, selenium can be supplemented through medication under the guidance of a doctor, which includes selenium yeast tablets and selenium yeast suspension. If you feel unwell, you should go to the hospital in time to avoid delaying your condition or triggering adverse reactions. The above medication should be taken in accordance with the doctor’s advice.