Astragalus root is a well documented immunostimulant. Long used in Traditional Chinese Medicine (TCM), it has become the herb of choice for deep immune building. According to TCM, astragalus has specific action on the lungs. It is also used as a spleen to nic to build qi, the vital energy of the body. As a preventative it works to build defensive energy or wei qi. Consumed as a food in China (and with growing popularity in the U.S.), astragalus is an appropriate tonic for the child who brings every cold or flu home from school or day care. Alcohol free. Astragalus membranaceus root used is certified organically-grown.