title: Vitamins: benefit of the doubt vs. doubts about benefit.  Negative studies have piled up, but are they a fair test?
mesh_terms: D019587:Dietary Supplements; D019317:Evidence-Based Medicine; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D013997:Time Factors; D014815:Vitamins / Q000009:adverse effects / Q000627:therapeutic use*
chemical_list: D014815:Vitamins