Does echinacea reduce duration of the common cold?
The effectiveness rating is a measure of how well echinacea is able to reduce duration of the common cold. The overall rating for this claim is 1 out of 3. There is little if any research to warrant the use of Echinacea to reduce duration of the common cold. Using Echinacea to reduce duration of the common cold will probably not yeild any positive results and is likely a waste of money.
The confidence rating is a mesure of how valid the effectiveness rating is. This rating is based on how many studies are included in the database on this topic.
There are 2 studies in the database on echinacea; the confidence rating is 40. A score above 80 means the effectiveness rating for this supplement is reliable. A score under 80 means there is insufficient evidence to ensure a reliable effectiveness rating.