Heavy Metal Contaminants in Yerberia Shop Products
Complementary and alternative medications, including the use of herbal medications, have become quite popular in the USA. Yerberias are found throughout the southwest and specialize in selling Hispanic herbal products. The products sold in these stores are not regulated by any governmental agency. Previous reports have found Ayurvedic medications contain high levels of lead, mercury, and arsenic. The primary purpose of this study is to examine the prevalence of heavy metal contaminants sold at Yerberia stores in the southwest. Yerberias in the Phoenix, Arizona area were identified via search of an on-line search engine using the words "Yerberia Phoenix." Every second store was selected, and products were purchased using a standard script. The products were subsequently analyzed for mercury, lead, and arsenic. The main outcome is the prevalence of heavy metal content in over-the-counter "cold" medications purchased at a Yerberia. Twenty-two samples were purchased. One product contained pure camphor (2-camphone) and was subsequently not further analyzed. Of the 21 samples analyzed, lead was found in 4/21 (19.4 %). Arsenic and mercury were in 1/21 (4.8 %) each. Because two samples contained two heavy metals, the total prevalence of heavy metals was 4/21 (19.4). Heavy metal contaminants are commonly encountered in over-the-counter herbal "cold" medications purchased at Yerberias in the southwest.
KeywordsHeavy metal Yerberia Contaminant Toxicity Herbal
Conflict of Interest
There are no financial, litigational, or other conflicts of interest involved in the preparation of this manuscript.
- 1.Barnes PM, Bloom B, Nahin R (2008) Complementary and alternative medicine use among adults and children: United States, 2007. National Health Statistics reports; no 12. Hyattsville, MD. National Center for Health StatisticsGoogle Scholar
- 6.Method 3050 B. Acid digestion of sediments, sludges, and soils. Environmental Protection Agency. http://www.epa.gov/wastes/hazard/testmethods/sw846/pdfs/3050b.pdf. Accessed 23 Oct 2011
- 7.Method 200.9, Revision 2.2 (1994) Determination of trace elements by stabilized temperature graphite furnace atomic absorption. Environmental Protection Agency. http://water.epa.gov/scitech/methods/cwa/bioindicators/upload/2007_07_10_methods_method_200_9.pdf. Accessed 23 Oct 2011
- 8.Method 7473 (2007) Mercury in solids and solutions by thermal decomposition, amalgamation, and atomic absorption spectrophotometry. http://www.epa.gov/sam/pdfs/EPA-7473.pdf. Accessed 23 Oct 2011
- 16.Herbal dietary supplements: examples of deceptive or questionable marketing practices and potentially dangerous advice (2010) United States Government Accountability Office. Report GAO-10-662 T. http://www.gao.gov/assets/130/124774.pdf. Accessed 23 Mar 2012.
- 17.Codex general standard for contaminants and toxins in foods (1994). http://www.codexalimentarius.net/download/standards/17/CXS_193e.pdf. Accessed 13 Nov 2011.