As you might recall, five NFL players—Kevin and Pat Williams of the Minnesota Vikings and Charles Grant, Deuce McAllister, and Will Smith of the New Orleans Saints—were suspended for four games last year after testing positive for bumetanide, a diuretic that can be used to mask the presence of steroids. The players claimed that they inadvertently ingested the bumetanide when they took StarCaps, an over-the-counter weight-loss supplement. Bumetanide is not listed as an ingredient in StarCaps, ...