While there is some evidence to suggest that elderberry can have some positive health benefits, it is not recommended to take it every day. Elderberry may interact with certain medications, and it can also have side effects such as nausea, vomiting, and diarrhea. To maximize the potential health benefits of elderberry, it is recommended to take it in moderation and according to the instructions on the package. Additionally, speak with your doctor before taking elderberry or any other supplement, as they can provide you with the best advice on how to use it safely.