http://articles.mercola.com/sites/articles/archive/2002/02/09/echinacea.aspxEchinacea, the popular herbal remedy that is purported to strengthen the immune system and fight infection, may cause mild or serious allergic reactions in people who use the herb to treat their allergy symptoms. Many equate 'natural' with safety, butenCommunityServer 2008.5 SP1 (Build: 31106.3070)