(Image source: bobbitt.com) Vitamin Shoppe Inc (NYSE:VSI), the health products retailer was upgraded from buy to conviction buy by Goldman Sachs on strong growth prospects in the 4th quarter of 2013. The price target was increased to $65 a share from $59. Just in the last three months, the stock is up nearly 24 percent. For example, third quarter revenues were up 14 percent and same store sales saw an increase of 2.6 percent. The sector is also performing well compared to the S&P 500. Vitamin Shoppe is currently trading above 2 percent on the upgrades.