"Seeing is believing," the founder of lab company Truvian told me. So I tried its tabletop blood testing device—which promises results in 30 minutes—for myself.

Wall Street Breakfast, Seeking Alpha's flagship daily business news summary, is a one-page summary that gives you a rapid overview of the day's key financial news. It is designed for easy ...

Opinion Columnist, The Americas, The Wall Street Journal Ms. O'Grady joined the paper in August 1995 and became a senior editorial page writer in December 1999.

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