[Vitamin C: more than a placebo].
D001205:Ascorbic Acid / Q000627:therapeutic use*; D004305:Dose-Response Relationship, Drug; D006801:Humans; D009747:Nutritional Physiological Phenomena; D012141:Respiratory Tract Infections / Q000517:prevention & control*
D001205:Ascorbic Acid
Mehr als ein Placebo.