Ephedra sinica (also known as Chinese ephedra or Ma Huang) is a plant species native to Mongolia, Russia (Buryatiya, Chita, Primorye), and northeastern China (Gansu, Hebei, Heilongjiang, Jilin, Liaoning, Nei Mongol, Ningxia, Shaanxi, Shanxi).
Ephedra (the genus of plants)
Ephedra (US-specific page on ephedrine-containing dietary supplements, observed (negative) health effects of these, and corresponding regulatory actions toward them)
List of herbs with known adverse effects
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*All information is based on published scientific research