Editor’s note: Seeking Alpha is proud to welcome Leon Laake as a new contributor. It’s easy to become a Seeking Alpha contributor and earn money for your best investment ideas. Active contributors also get free access to SA Premium. Click here to find out more » Flashpop/DigitalVision via Getty ImagesInvestment thesis Medifast (NYSE:MED) has a long history of weight loss management but only a restructure of its business in 2016 brought new life into this stock. In 2016, Medifast started to focus on its product Optavia which helped to grow its revenue and income tremendously while perfecting its profitability.