Leftose contains purified lysozyme, a natural enzyme derived from egg white. Leftose thins and breaks down clingy phlegm from air passage walls, making it easier to cough the phlegm out. Sore throat is often the result of throat inflammation. Leftose helps to reduce the inflammation and hence, pain, swelling and throat discomfort are relieved. Each ml contains 5mg of Lysozyme Hydrochloride. Directions: 1-2 years old : 1-2ml 3 times daily. 3-6 years old : 2-3ml 3 times daily. 7-12 years old : 5-6ml 3 times daily. Ingredients: Each ml contains 5mg of Lysozyme Hydrochloride, which is derived from egg white and may not be suitable for those with egg allergies.