Vitamin C is an essential water-soluble vitamin involved in numerous critical bodily functions. Research indicates that vitamin C works with a class of nutrients known as bioflavonoids. Bioflavonoids are natural phytochemicals found in fruits and vegetables that may assist vitamin C in providing many of its health benefits. Rosehips, besides being an excellent source of vitamin C, also contain a wide range of beneficial phytochemicals. These include polyphenols, as well as, beta-carotene, lycopene, and lutein. In addition to supporting healthy immune function, vitamin C may also play an important role in the stability and strength of connective tissue, collagen, and blood vessels. While vitamin C is found in many fresh fruits and vegetables, taking a vitamin C supplement may provide some extra assurance that you are getting enough of this critical nutrient.