title: HHS to study ephedra, step up enforcement against illegal marketing.
mesh_terms: D019587:Dietary Supplements / Q000009:adverse effects*; D029789:Ephedra / Q000009:adverse effects*; D006801:Humans; D008389:Marketing of Health Services / Q000331:legislation & jurisprudence; D028321:Plant Preparations / Q000009:adverse effects*; D012106:Research; D014481:United States; D014483:United States Dept. of Health and Human Services; D014486:United States Food and Drug Administration
chemical_list: D028321:Plant Preparations