In principle, weight loss should be an incredible honey pot for pharmaceutical, packaged food, and consumer service companies. In reality, it has proven considerably more difficult for anybody to make consistently good money in the space. Sometimes the problems are largely self-inflicted (Weight Watchers (NYSE:WTW) certainly comes to mind here), and sometimes the issue is more related to consumer patience/discipline.
Whatever the case, investors trying to profit from the weight loss theme through publicly-traded stocks have faced a treacherous environment. Nutrisystem (NASDAQ:NTRI) has been strong this year, but the five-year returns of stocks like Weight Watchers, Nutrisystem, Arena Pharmaceuticals (NASDAQ:ARNA), and Vivus (NASDAQ:VVUS) haven't been that great relative to the S&P...
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