To better understand the health benefits and the potential drawbacks of elderberries, mbg spoke with integrative medicine doctors and immunologists. Here’s what they have to say about the supplement and how it may react with viruses. Elderberry flowers and leaves were traditionally used to manage inflammation, pain, and swelling. Today, the berry is most commonly found in supplement, syrup, or tea form to support the immune system2 and help fight cold and flu symptoms. One study published in the Journal of Functional Food specifically looked at the influenza virus in vitro and found that elderberry extract3 “showed mild inhibitory effect at the early stages of the influenza virus cycle, with considerably stronger effect in the post-infection phase.” “In general, elderberries are an excellent source of antioxidants, which help to maintain a strong immune system,” functional medicine doctor Tiffany Lester, M.D., tells mbg. “Especially against viruses.” Elderberry should not be used in place of prescription medicines or other treatments. Anyone thinking about adding elderberry to their supplement routine should consider consulting a doctor. The research on this topic is still developing, and there’s no conclusive evidence that elderberry creates a cytokine storm in all COVID-19 patients. To avoid any potential risks, Lester suggests taking other immune-supporting supplements, like vitamin C, vitamin D, quercetin, glutathione, and zinc.