Once available only in natural product stores and farmers’ markets, organic foods are now found in conventional supermarkets, value-priced big-box chains, and an expanding array of direct-to-consumer markets. U.S. organic food sales are expected to reach $25 billion in 2010, up from $3.6 billion in 1997. Organic products accounted for over 3.5 percent of food sold for at-home consumption in 2009.