The Rosehip plant produces an amazing little berry that is not only packed with Vitamin C, Essential Fatty Acids, and healthy minerals, it contains an oil that is prized as a natural skin and hair care ingredient. Rosehip Oil comes in an amazing amount of varieties, the most popular of which are straight up, cold pressed Rosehip Seed Oil and Organic Rosehip Seed Oil. These two Oils are fairly delicate, with a shelf life of only around 6 months. This makes where you purchase your Rosehip Oil very important. You must work with a trusted retailer, or you could run the risk of receiving an expired batch. Because of Rosehip Oil's high fatty acid content, it can sometimes have a slightly acidic aroma, even when it is fresh. This makes testing freshness "by nose" pretty difficult. It's a good idea to keep track of your fragile Oils, like Rosehip, by labeling them with the date you received them.
via www.naturalbeautyworkshop.com