Elderberry is very high in vitamins and antioxidants. The main purpose is to release mucus from the body . 
Mucus in the body means underlying sickness is present . We recommend taking elderberry when you are feeling congested or have flu and cold like symptoms .  
Consume your elderberry as a tea like my family does with 1 teaspoon to 1 cup of hot water . Let steep for 10 mins . Add agave for sweetener . Try without first as that is best .