It is made up of just three herbs: Huang Qi/Astragalus (to read more about Astragalus click here), Bai Zhu/Atractylodis Macrocephalae , and Fang Feng/Radix Ledebouriellae. These three powerful herbs combine together to boost the immune system, strengthen the digestive system (so that we can be sure to gain the nutrients from our food), and fortify the body so that we can fight off wind-borne viruses and bacteria. Jade Windscreen is great for people who are prone to colds,flu’s,ear infections and allergies. It is also a great preventative formula if you’re flying or have been around a lot of sick people. Many Chinese herbal formulas need to be purchased from licensed health professionals but this one can often be found at Whole Foods or other health food stores.