I have been giving my 19 year old son astragalus root capsules daily for a couple of months. He started college (a whole new set of germs to contend with), he had to get a bunch of vaccines (because he is studying to be an EMT), and it is cold and flu season and he doesn't have time to be sick.
So far so good. He has been quite healthy and seems to be avoiding sickness though he is often around it. But I will give further observations in a few more months. (I decided on astragalus root because it seemed to keep one of my small children well though the whole family was sick a few years ago. I had been giving it to him regularly to prevent lyme disease after a nasty tick bite. He didn't get Lyme disease or anything else that fall! )
Of interest is that he was stung by a wasp yesterday. Normally he reacts pretty badly to them. However, after the initial sting, he had very little reaction.
I suspect the astragalus root has been helpful to his immune system.
Of course, it won't do to take astragalus root once there is a sting. It is something to use more as a preventative.
My son is a big guy. I give him 2 capsules once or twice a day. (Basically, whenever I cross paths with him I hand him 2 capsules of astragalus! )
~Mama to Many~