Consumers who are interested in seeking out organic foods tend to reject chemicals in a broader context than just those applied in agricultural practices. Thus, this group includes many people who seek herbal alternatives to drugs (as well as other therapies perceived as natural). Western herbs, by virtue of being grown in Europe and America where the organic foods movements began, and being most often sold as single herb remedies, are sometimes available as organically grown products. During the late 1990s, an increasing number of patients of practitioners prescribing Chinese herbs have inquired about organic production of the herbs. For them, the situation is complex, both because the herbs come from China and because the usual products are large mixtures of herbs from numerous sources within China, making it difficult to maintain any control over the growing conditions of each ingredient.