The price of sodium selenite is usually around $45, with price differences by region and method. Sodium selenite is sold at major pharmacies nationwide and varies by dosage form. Sodium selenite is indicated for diseases caused by selenium deficiency, such as macrosomia and keshan disease. It is used clinically to prevent and treat hypertension, coronary heart disease, and cancer. Proper supplementation of sodium selenite can prevent organ aging lesions, delay aging and improve immunity. Purchase is subject to local prices. Precautions for use: specific dosage as prescribed by the doctor, taking selenium overdose will cause selenium toxicity, the maximum safe amount of 400ug per day.If allergy occurs, stop the drug immediately to avoid symptoms such as red rash or even anaphylactic shock. It is recommended that patients who need to use this drug, under the guidance of a professional doctor to take, do not use on their own to avoid adverse effects.