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Natural Power Builders: The Pros and Cons

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CREATINE and ANDROSTENE: They're the natural supplements that scored with Mark McGwire--are they help or hype?

When Cardinals first baseman Mark McGwire broke baseball records with the most home runs in one season, he was hailed as an outstanding athlete--but he also made news for another reason. McGwire was taking Androstene (a brand-name for androstenedione) and creatine, two natural supplements used to build muscle and enhance athletic performance. But how much can sports supplements imp...