They contain the patented lactic acid bacterium Limosibacillus reuteri Protectis -L.reuteri Protectis 17938, which has been tested in 150 clinical studies and proven to be effective and safe for children. Vitamin D: It contributes to the normal functioning of the immune system It is necessary for normal bone growth and development Use Shake the vial well for at least 10 seconds before administration. After opening, the container turns upside down. The drops can be given on a spoon. Recommended dose: 5 drops once a day. Warning It is not intended for use in premature infants. Do not exceed the recommended daily dose. It should not be used as a substitute for a varied diet. The package contains a white drying aid, which serves to extend the shelf life. It is not intended for consumption. Keep out of reach of children. Keep the container closed. Avoid contact with liquids such as saliva or water. After opening, use within 3 months. Try other products of the BioGaia brand, which you can find in the categories Nutritional supplements, Vitamins for children for immunity and Immunity. The product has a 7% discount. If you are not sure about the choice of this product, be inspired in the category Vitamins for children for immunity.