Quinoa is generally available in prepackaged containers as well as bulk bins. Just as with any other food that you may purchase in the bulk section, make sure that the bins containing the quinoa are covered and that the store has a good product turnover so as to ensure its maximal freshness. Whether purchasing quinoa in bulk or in a packaged container, make sure that there is no evidence of moisture. When deciding upon the amount to purchase, remember that quinoa expands during the cooking process to several times its original size. If you cannot find it in your local supermarket, look for it at natural foods stores, which usually carry it.
The most common type of quinoa you will find in the store has an off-white color but red and black quinoa are becoming more available. You may even be able to find a tri-color mixture sold in packages or bulk bins.
Store quinoa in an airtight container. It will keep for a longer period of time, approximately three to six months, if stored in the refrigerator.