Elderberry Syrup is an excellent immune booster for both children and adults. Maine Medicinals grows the elderberries and produces the syrup on their organic farm in Dresden, Maine. According to studies*, elderberries (Sambucas nigra) are an effective anti-viral and an anti-infammatory. Studies have also shown that elderberries can These data suggest a significant reduction of cold duration and severity in air travelers.. I take it when I remember :) but I especially like to take when I travel. Used daily, it supports the immune system and Organic, gluten free and kosher.