Think just because an ingredient is printed on the label of your corner store supplement it has to be legit?
Think again. Here's the truth about this often-listed dietary ingredient...
Federal Regulations state dietary ingredients “must be listed by their common or usual names when present in dietary supplements.” In the case of men’s specialty supplements, the dietary ingredients are often displayed as a list called a “Proprietary Blend” which lumps all of the ingredients into a single weight.
“Deng sen” is listed as an ingredient in the proprietary blends of dozens of supplements currently marketed in the United States. 100% OF THE BRANDS LISTING "DENG SEN" AS AN INGREDIENT HAVE BEEN PROVEN TO BE LABELED AS U.S. MADE, BUT ALL ARE ACTUALLY IMPORTED FROM CHINA. Rhino 7 Pills (pictured) and dozens of other similar-looking "Rhino pills" are common examples."
Questions about Deng sen were raised at MaxLabs US during a research project that explored hundreds of ingredients listed as content for competitive male enhancement supplements. The competitive analysis included: 1) clinical assessment of ingredients [potential therapeutic value, presence & merit of supporting scientific literature], 2) a weights & measures analysis and 3) wholesale ingredient price benchmarking.
An extensive search of published literature for information on “Deng sen” included sources such as the World Health Organization’s Medicinal Plants in China and The Encyclopedia of Traditional Chinese Medicines, but was expanded to include other sources,, after the initial search for the term “Deng sen” yielded no results. The expanded search also failed to identify a material of this name.
Compliance with Good Manufacturing Practices (cGMP) is another consideration regarding this questionable ingredient. "Identification testing" of ingredients is a routine part of compliant processes in which incoming raw materials are compared to commercially acquired "reference materials" to verify authenticity of the ingredient prior to use in production of a finished supplement. Such testing is mandatory at top-tier manufacturers.
It was discovered that no “reference standard materials” are available from leading suppliers for a material named “Deng sen.” This would serve as a barrier to the use of any material labeled as Deng sen at cGMP manufacturing facilities in the United States.,
Similarly, during price benchmarking, the materials sourcing team, well-versed in global procurement of raw materials used in dietary supplements, could not find “Deng sen” offered for sale via any channel.
Evaluated brands listing “Deng sen” as an ingredient include “Extreme Diamond” and “Rhino 7” (produced by Guangzhou Together Trade Co., Ltd. & Beauty Technology Co., Limited, Guangdong, China). Both brands have been subjected to recalls by the FDA for containing undeclared active pharmaceutical ingredients which are untested and unstudied.
Conclusions: “Deng sen” is a fictitious ingredient name Chinese manufacturers place on the Supplement Facts Panels of dietary supplements promoted for sexual enhancement. For consumer protection, federal interception of imported products with fictitious and/or non-compliant labeling may serve as an effective adjunct to the practice of confiscating imported products found to contain adulterants.
 21 CFR 101.36(b)(2)(iii)(F) and (b)(3)
 "Medicinal Plants in China: A Selection of 150 Commonly Used Species." The Institute of Chinese Materia Medica / China Academy of Traditional Chinese Medicine. World Health Organization, n.d. Web. 26 Nov. 2016. <http://iris.wpro.who.int/handle/10665.1/6737>.
 Zhou, J., Xie, G., et al. (2011). Encyclopedia of Traditional Chinese Medicines (Vol. 6). Berlin, Heidelberg: Springer.
 Brickell, C., Zuk, J. (2004). The American Horticultural Society A-Z Encyclopedia of Garden Plants. London, UK: Dorling Kindersley Pub.
 "Independent Analysis on Supplements & Nutrition." Independent Analysis on Supplements & Nutrition. Examine.com, n.d. Web. 26 Nov. 2016. <https://examine.com/>.
 Bensky, D. & Clavey, S. (2015). Chinese Herbal Medicine: Materia Medica (Portable 3rd Edition). Seattle, WA: Eastland Press.
 “Ingredients/Standards.” Chromadex. Chromadex.com, Web. 27 Nov. 2016. <https://www.chromadex.com/search?SearchParam=deng%20sen>.
 “Analytical/Chromatography.” Sigma Aldrich Diagnostics. sigmaaldrich.com, Web. 27 Nov. 2016. <http://www.sigmaaldrich.com/catalog/search?term=deng+sen&interface=All&N=0+220003052&mode=match%20partialmax&lang=en®ion=US&focus=site>
 Tainted Sexual Enhancement Products. U.S. Food and Drug Administration, (n.d.). Retrieved November 27, 2016, from http://www.fda.gov/Drugs/ResourcesForYou/Consumers/BuyingUsingMedicineSafely/MedicationHealthFraud/ucm234539.htm