Just for everyone's information.. I was told, by a nutritionist in training, that elderberry would be good to take to combat the flu. He knew I have Lupus. I told him there is a careful balance with lupus patients between supporting the immune system and anti inflammatory support. Well, I trusted too much, and didn't research on my own. After 4 days, I noticed I was feeling very ill after drinking. I went online and found a note saying that people with lupus, or MS, should not drink elderberry as it might boost immune too much. Well, it certainly did with me. I had to go lie down after drinking every time. And I ended up with terrible lower back pain last night ( I think my intestines) and had to go to bed. I took Tylenol for the discomfort so I could sleep. Just wanted to share in case anyone was thinking of trying a holistic approach to the flu.