Excellent stuff. I use it heavily as my line of work exposes me to sick people quite frequently. It does everything you mentioned and more.
One caution: anyone taking prescription medicine should be sure that there is no documented interaction problems as the CYP3A enzyme inhibitors present in grapefruit products can potentiate the drug dynamics such as half life in the body. This is information you can find online by going to a search engine and typing in "grapefruit"+"drug interactions" and making sure any drugs you are taking are not on the list.