Bought as a means of immunity in case of colds. Almost immediately and I had to use. Son picked up a virus ((, and from him and I caught. The temperature was very tall. Immediately began taking this medication (2 capsules per day) and just after 2-3 days of illness was gone !! but continued to take a week after to maintain immunity. to be objective I will add that extra drink during illness lozenges Zinc (Nature's Way). But I really was surprised by how quickly and without consequences, we have recovered this time! *** I hope my review It was useful for you :))