I can anecdotally vouch for this. A friend told me about elderberry a few years ago when I told him I had flu symptoms. I went to Whole Foods around 7pm and bou

I can anecdotally vouch for this. A friend told me about elderberry a few years ago when I told him I had flu symptoms. I went to Whole Foods around 7pm and bought the extract. Took a double dose with Vit C and D and tons of water every 4-6 hours. One ibuprofen as needed to keep my temperature down. Woke up the next day around noon and the flu was gone. Been using it ever since.