Elderberry syrup strengthens the immune system very well, and one will usually see results within two doses. Safe for children of all ages and tastes good too! Elderberry is a top notch anti inflammatory and a great source of potassium. Elderberry syrup strengthens the immune system very well, and one will usually see results within two doses. Safe for children of all ages and tastes good too! Elderberry is a top notch anti inflammatory and a great source of potassium. This is a MUST have for anyone with children, allergies, susceptibility to colds and flu or who works in a public place.