Xavier selenium yeast tablet is mainly a kind of yeast tablet that supplements trace elements of selenium to carry out, usually the role of selenium yeast tablet has the following points: 1, the most commonly applied role is to play to enhance the immunity of the human body and regulate the immune function. Because the human body if lack of selenium will appear immune function is low, free radicals increase, so taking selenium yeast tablets can regulate the immune effect of the human body. 2, taking selenium yeast tablets can reduce the risk of tumor development, usually selenium ion is an effective prevention and anti-tumor trace elements, so supplementation of selenium yeast tablets can play the role of tumor prevention. 3, selenium yeast tablets can enhance the antioxidant ability of the human body, for the prevention of aging and anti-oxidant free radicals. 4, selenium yeast tablets also have a certain role in liver protection, for fatty liver disease, alcoholic liver disease, chronic cirrhosis of the liver have the effect of regulating liver function.