L-硒-甲基硒代半胱氨酸与亚硒酸钠、硒酸钠等无机硒相比较，具有毒性小的优点。与富硒酵母、硒化卡拉胶、硒蛋白、富硒食用菌粉等有机硒相比较，具有化学结构明确、含量稳定、水溶性好的优点。是硒类营养强化剂的更新换代产品。  
 
      Compared to inorganic selenium of sodium selenite and sodium selenate, L-selenium-methylselenocysteine has the advantage ofless toxicity. And it also has the advantages of defined chemical structure, stable content and good water solubility when compared to se-enriched yeast, selenizing carrageenan, selenoprotein and selenium enrichment edible fungus powder, which is the updated product of selenium nutrition enhancer.