1. U.S. Food and Drug Administration [Internet]
Silver Spring (MD): Consumer Updates: Can a dietary supplement treat a concussion? No! c2014 [cited 2015 May 20]. Available from: http://www.fda.gov/ForConsumers/ConsumerUpdates/ucm378845.htm.
2. U.S. Food and Drug Administration, Center for Food Safety and Applied Nutrition [Internet]
Silver Spring (MD): Draft guidance for industry: Dietary supplements: New dietary ingredient notifications and related issues; c2011 [updated 2015 Apr 22; cited 2015 May 20]. Available from: http://www.fda.gov/Food/GuidanceRegulation/GuidanceDocumentsRegulatoryInformation/ucm257563.htm.