Elderberry has been used for centuries to improve the immune system and mitigate flu symptoms.

Elderberries are rich in polyphenolic flavonoids, quercetin, rutin, kaempferol and isorhamnetin. A 2016 study showed these flavonoids “have a wide range of biological actions including anti-carcinogenic, anti-inflammatory, and anti-viral activities.” This high anthocyanin level helps thrust Elderberry to the top tier of the antioxidant ORAC scale.