1. Trends in the use of complementary health approaches among adults: United States, 2002-2012;Clarke;Natl Health Stat Report,2015
2. Changes in herb and dietary supplement use in the US adult population: a comparison of the 2002 and 2007 national health interview surveys;Wu;Clin Ther,2011
3. Expenditures on complementary health approaches: United States, 2012;Nahin;Natl Health Stat Report,2016
4. Herbal supplement sales in US increase 7.7 % in 2016. Consumer preferences shifting toward ingredients with general wellness benefits, driving growth of adaptogens and digestive health products;Smith;HerbalGram,2017
5. Supplement Business Report 2016,2016