Among
14 brands of ginseng dietary supplements recently purchased in Japan
and tested by ConsumerLab.com, only five
products passed independent
testing by ConsumerLab.com. Six products did not contain the ginseng
they claimed on their labels, and three others exceeded acceptable
pesticide levels. One product that failed testing carried the Japan
Health, Food & Nutrition Food (JHFA) seal, indicating that its
quality had been checked and approved by an agency sanctioned by the
Ministry of Health. This is the second major dietary supplement Product
Review reported by ConsumerLab.com for the Japanese market. ConsumerLab.com,
which independently tests popular dietary supplements, has conducted
similar testing in the US since 1999. ConsumerLab.com published a report
on Japanese CoQ10 supplements in May 2005.
ConsumerLab.com's Ginseng Product Review focused on two related types of ginseng:
American (sometimes labeled as Western or Panax quinquefolius) and Asian (often
labeled as Korean, Chinese, or Panax ginseng). Ginseng dietary supplements
are taken primarily to improve energy, although this effect has not been clinically
demonstrated. Ginseng products are sold in many forms including drinks, tonics,
pills, capsules, tablets, and pastes and cost as much as 12,000 yen (approximately
$120 US). Products were purchased through stores, on-line retailers, catalogues,
or multi-level marketing companies. The products were then tested for their
levels of ginsenosides (key markers for the quality of ginseng) and for potential
contamination with the heavy metals (lead, cadmium, and arsenic) and pesticides,
including hexachlorobenzene (HCB), quintozene, DDT, and benzene hexachlorides
(BHCs).
No ginsenosides could be detected in two products: a popular energy drink and
a tonic, although both were sold as pharmaceutical products and subject to
strict regulation by the Ministry of Health. A product sold widely in convenience
stores that carried the JHFA seal contained only 60% of its claimed amount
of ginsenosides. Three other products contained only 23% to 41% of the expected
minimum amount of ginsenosides based on their claimed levels of ginseng.
The three products contaminated with pesticides included one sold online, another
sold through drug stores, and a third sold through a major multi-level marketing
company. These products exceeded acceptable levels of BHCs by 80 to 500%. BHCs
are potentially carcinogenic and toxic to various organs and include the compound
lindane (gamma-BHC). Two of the products also exceeded the acceptable level
for hexachlorobenzene (HCB) by 36% and 49%, respectively. HCB is a probable
human carcinogen banned from most food crop uses throughout the world and is
a breakdown product from another pesticide, quintozene. One of the products
that was high in HCB also exceeded the acceptable level for the pesticide quintozene
by a small amount. The ginseng products that passed testing included three
products in tablet form, a liquid (sold as a pharmaceutical), and a paste that
carried the JHFA seal.
"These results are very disturbing. It is sad that individuals hoping to
enhance their well-being with ginseng are, with some products, exposing themselves
to potentially harmful substances or are getting ripped off," said Tod
Cooperman, MD, President of ConsumerLab.com. "We found similar problems
in the US in 2000, which, on testing again in 2003, had significantly diminished.
We hope that our findings will steer consumers toward better quality products
and cause the market to fix these problems."
The Ginseng Product Review is found at
http://www.consumerlab.com/ja-JP/results/gingseng.asp.(In
Japanese.) The report identifies
and lists the five products that passed the testing
and provides general descriptions of those that did not. Subscription
is required for the report, which also includes expert information
on how to buy and use ginseng. Subscription is $9 (approximately ¥950)
for the report or $24 (approximately ¥2,500) for 12 months of reports
online.
(NOTE: Non-subscribers
may see the initial portion of the product review, in English, at http://www.consumerlab.com/results/ginseng.asp)
ConsumerLab.com is a leading provider of consumer information and independent evaluations
of products that affect health and
nutrition. The company is privately
held and based in New York, USA. It has no ownership from, or interest
in, companies that manufacture, distribute, or sell consumer
products. Subscriptions
to ConsumerLab.com are available online. For group subscriptions or voluntary
product testing, contact Elena Yoo, Japan Manager, at Elena.Yoo@ConsumerLab.com.
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