These things are always underresearched, but there's more evidence than just this. For example: https://www.ncbi.nlm.nih.gov/m/pubmed/11399518/ https://www.ncb

These things are always underresearched, but there's more evidence than just this. For example: https://www.ncbi.nlm.nih.gov/m/pubmed/11399518/ https://www.ncbi.nlm.nih.gov/m/pubmed/11399518/ https://www.researchgate.net/profile/Ethan_Basch/publication/259696401_An_Evidence-Based_Systematic_Review_of_Elderberry_and_Elderflower_Sambucus_nigra_by_the_Natural_Standard_Research_Collaboration/links/02e7e534e9f25f02b4000000/An-Evidence-Based-Systematic-Review-of-Elderberry-and-Elderflower-Sambucus-nigra-by-the-Natural-Standard-Research-Collaboration.pdf https://www.researchgate.net/profile/Ethan_Basch/publication...