1. FDA Consumer Health Information FDA 101: Dietary Supplements U.S. Food and Drug Administration 2008 http://www.fda.gov/downloads/ForConsumers/ConsumerUpdates/ucm050824.pdf
2. FDA Consumer Health Information Final Rule Promotes Safe Use of Dietary Supplements U.S. Food and Drug Administration 2007 http://www.fda.gov/downloads/forconsumers/consumerupdates/ucm143584.pdf
3. Use of prescription and over-the-counter medications and dietary supplements among older adults in the United States;Qato;JAMA,2008
4. Trends in dietary supplement use among US adults from 1999-2012;Kantor;JAMA,2016
5. Trends in the use of complementary health approaches among adults: United States #bib2002-2012;Clarke;Natl Health Stat Report,2015