title: Should meta-analyses trump observational studies?
authors.forename: Stephanie M
authors.initials: SM
authors.lastname: Chang
mesh_terms: D019587:Dietary Supplements / Q000009:adverse effects*; D006801:Humans; D008903:Minerals / Q000009:adverse effects*; D009026:Mortality; D014815:Vitamins / Q000009:adverse effects*
chemical_list: D008903:Minerals; D014815:Vitamins