title: Nutritional ergogenics: help or hype? Some 'performance enhancers' may leave marathoners running on empty.
authors.forename: M H
authors.initials: MH
authors.lastname: Williams
mesh_terms: D004734:Energy Metabolism; D005221:Fatigue / Q000517:prevention & control*; D006801:Humans; D009747:Nutritional Physiological Phenomena; D005082:Physical Exertion; D013177:Sports