Each capsule of Swanson Rose Hips Extract provides 600 mg of pure joint health nutrition from the Rosa canina fruit. So, what is a rose hip, exactly? It’s simply the fruit of a rose plant, and Rosa canina or Dog Rose, is the most widely used commercial source. Rose hips are widely recognized as a source of vitamin C, but they contain other active phytonutrients as well. We sought out the best, most pristine rose hips we could find to bring you this Swanson Superior Herbs version of a time-honored supplement for joint and mobility health.