... wide range of people, all ages;3. Non-toxic, pollution-free, contamination-free, natural, wild, without any side effects, , can be ... .Big Flower Apocynum venetum tea contains flavonoids, by scavenging reactive oxygen free radicals, plays an anti-arrhythmia, anti-myocardial ischemia role, ... also helps to improve the cerebral ischemia, and to improve oxygen supply capacity of the brain and. Thus it has ...