Sentence:  Athletes' use of herbal supplements has skyrocketed in the past two decades. At the top of the list of popular herbs are echinacea and ginseng, whereas garlic, St. John's wort, soybean, <WSD>ephedra</WSD> and others are also surging in popularity or have been historically prevalent. 
Meaning of the word marked with <WSD> tags:  A stimulant derived from the plant (noshow=1) used in traditional Chinese herbal medicine and in over-the-counter weight-loss aids.