Astragalus root has been used in Chinese medicine for millenia to strengthen vital life force (Chi), the immune system and lungs.
I use it as a tonic every day from Fall through Spring, and am able to avoid most of the colds that make the rounds through our communities. I have begun using it every day from Spring to Fall as a preventative for Lyme Disease, on the recommendation of Stephen Buhner.
The menstrum is high-quality 100 proof vodka, not harsh grain alcohol. 2 oz cobalt dropper bottle from Herbs from the Labyrinth