Sterilfarma? Sterilflu Dietary supplement Description Sterilflu? is a supplement based on N-Acetyl cysteine, Methylsulfonylmethane, Vitamin C, Zinc, extracts from Licorice and Grindelia that contribute to the normal function of the immune system, assist the fluidity of bronchial secretions and the well-being of the nose and throat, support the functionality of the upper respiratory tract. How to use: we recommend taking 1 sachet per day. Format Box of 20 sachets