It is hard to imagine a more stupid or more dangerous way of making decisions than by putting those decisions in the hands of people who pay no price for being wrong.
“EtG” stands for ethyl glucuronide, a metabolite of alcohol, and was reported by Gregory Skipper, M.D. and Friedrich Wurst, M.D., in November 2002 at an international meeting of the American Medical Society, to provide proof of alcohol consumption as much as 5 days after drinking an alcoholic beverage, well after the alcohol itself had been eliminated from the body.
Almost 98% of ingested alcohol is eliminated through the liver in an oxidation process that involves its conversion to acetaldehyde and acetic acid, but the remaining 2% is eliminated through the urine, sweat, or breath.1
- Ethyl Glucuronide (EtG) was introduced in 1999 as a biomarker for alcohol consumption,2 and was subsequently suggested as a tool to monitor health professionals by Dr. Gregory Skipper because of its high sensitivity to ethanol ingestion.3 In his study Dr. Skipper arbitrarily chose a value of 100 as a cut-off for EtG. The rationale behind this value is not cited.
In 2003, because of these and other reportedly remarkable results (e.g., positive findings, confirmed by admissions by the tested individuals, after traditional urine tests had registered negative)
EtG testing began in the United States after Dr. Skipper pitched it to National Medical Services, Inc. (NMS Labs) and it was developed as a Laboratory Developed Test (LDT).
The relevance to the article below is the fact that the EtG paved the way for the hair tests described. The EtG is the index case and prototype for an array of unproven forensic tests introduced to the market as LDTs.
The LDT pathway was basically developed for laboratory tests that would not otherwise come to market due to the prohibitive costs of FDA approval (for example a test for a rare disease). Bringing an LDT to market does not require testing in humans (in vivo). Nor does it require that it be shown the test is testing for what it is purportedly testing for (validity). It is essentially an honor system. It was not designed for “forensic” testing but for simple testing with low risk.
None of this testing is approved by the FDA. It is essentially an unregulated industry.
NMS became a leading proponent of EtG testing and, starting in 2003, began publishing claims promoting the absolute validity and reliability of the EtG in detecting alcohol. Akin to the vitamin and supplement industry those promoting and selling the tests could say anything they want—and they did.
NMS initially established a reporting limit or cutoff of 250ng/ml at or over which EtG test results would be reported as “positive” for drinking alcohol. This was later upped to 500ng/ml, then 1000 ng/ml.
NMS reported it as the “Gold Standard” claiming any value above 250 ng/ml indicated “ethanol consumption.”
It was subsequently found to be so sensitive that it could measure incidental exposure to alcohol in foods, over the counter cold medications, mouthwash4,5, hand sanitizer gel6, nonalcoholic beer7, and nonalcoholic wine.8
As the cutoff value got higher they added another minor metabolite of alcohol, EtS, as a “confirmatory” LDT.
The authors of a 2011 study demonstrating that hand sanitizer alone could result in EtG and EtS concentrations of 1998 and 94 mug/g creatinine concluded that:
“in patients being monitored for ethanol use by urinary EtG concentrations, currently accepted EtG cutoffs do not distinguish between ethanol consumption and incidental exposures, particularly when uine specimens are obtained shortly after sustained use of ethanol containing hand sanitizer.”9
Sauerkraut and bananas have even recently been shown to cause positive EtG levels.10
A 2010 study found that consumption of baker’s yeast with sugar and water11 led to the formation of elevated EtG and EtS above the standard cutoff. EtG can originate from post-collection synthesis if bacteria is present in the urine.12 Collection and handling routines can result in false-positive samples.13
EtG varies among individuals.14 Factors that may underlie this variability include gender, age, ethnic group, and genetic polymorphisms.
“Exposure to ethanol-containing medications, of which there are many, is another potential source of “false” positives.15
On August 12, 2006, The Wall Street Journal published a front-page article, titled “A Test for Alcohol – And Its Flaws.”.16
Quoting Dr. Skipper, among others, the article includes:
“Little advertised, though, is that EtG can detect alcohol even in people who didn’t drink. Any trace of alcohol may register, even that ingested or inhaled through food, medicine, personal-care products or hand sanitizer.”
“The test ‘can’t distinguish between beer and Purell’ hand sanitizer, says H. Westley Clark, director of the Federal Substance Abuse and Mental Health Services Administration. . . ‘When you’re looking at loss of job, loss of child, loss of privileges, you want to make sure the test is right”, he says…”
“Use of this screen has gotten ahead of the science,’ says Gregory Skipper…”
Methinks Dr. Skipper might have realized this when he initially proposed it as an accurate test after a pilot study done on only a handful of subjects. Or perhaps when he used the LDT pathway to bypass FDA approval and oversight.
On September 28, 2006, SAMHSA, a federal agency that is part of the U.S. Department of Health and Human Resources, issued an Advisory, which on the first page contained a “grey box” warning, as follows:
“Currently, the use of an EtG test in determining abstinence lacks sufficient proven specificity for use as primary or sole evidence that an individual prohibited from drinking, in a criminal justice or a regulatory compliance context, has truly been drinking. Legal or disciplinary action based solely on a positive EtG, or other test discussed in this Advisory is inappropriate and scientifically unsupportable at this time. These tests should currently be considered as potential valuable clinical tools, but their use in forensic settings is premature.”17
Bias has been identified as a large problem with drug trials.18 Industry-sponsored research is nearly four times as likely to be favorable to the company’s product as NIH-sponsored research.19 As an example, one survey of seventy articles about the safety of Norvasc (amlodipine) found that 96% of the authors who were supportive of the drugs had financial ties to the companies that made them.20
But what about the multi billion dollar drug-testing industry and the financial ties here?
Imagine if this was a drug and not a drug-test.
Essentially Greg Skipper and the FSPHP arm of ASAM launched a very lucrative joint business venture with a commercial drug-testing lab. They introduced the test via a loophole as a laboratory developed test. An LDT has no FDA regulation so the lab was able to promote, market and sell these tests with no meaningful oversight or accountability.
The lab then contracted with state licensing boards and their state PHPs (who designed, implemented and managed drug and alcohol testing programs for nurses and doctors). A mutually beneficial scheme for the labs (who collect the samples) and the PHPs (who utilize, interpret and report the results.
The PHPs develop the arbitrary cutoff levels based on alleged “scientific” research and the labs promote whatever they say. “Gold-Standard,” “accurate” and “reliable.”
How many lives were ruined by this test? How many careers were lost, families shattered and futures erased. I would venture to say a lot. Just look through all of the legal cases as I have. It is unconscionable. Sociopathic profiteering.
How many committed suicide feeling helpless, hopeless and entrapped?
And the labs have taken a “stand your ground” approach. Never admit wrongdoing. Never settle.
In a February 2007 article in the magazine “New Scientist,” Dr. Skipper is quoted
“…there is not yet an agreed threshold concentration that can be used to separate people who have been drinking from those exposed to alcohol from other sources. Below 1000 nanograms of EtG per millilitre of urine is probably ‘innocent’, and above 5000 booze is almost certainly to blame. In between there is a “question zone…”
No Dr. Skipper—it is you who is most certainly to blame and you alone. Every time you upped the threshold you claimed it was reliable and accurate starting with a level of 100.
And what of all the people whose lives you ruined by introducing junk science with no evidence base via a regulatory loophole. “probably innocent?” Shame on you Dr. Skipper…. Shame..shame..shame.
- Bean P. State of the art contemporary biomarkers of alcohol consumption. MLO Med Lab Obs. Nov 2005;37(11):10-12, 14, 16-17; quiz 18-19.
- Wurst FM, Kempter C, Seidl S, Alt A. Ethyl glucuronide–a marker of alcohol consumption and a relapse marker with clinical and forensic implications. Alcohol Alcohol. Jan-Feb 1999;34(1):71-77.
- Skipper GE, Weinmann W, Thierauf A, et al. Ethyl glucuronide: a biomarker to identify alcohol use by health professionals recovering from substance use disorders. Alcohol Alcohol. Sep-Oct 2004;39(5):445-449.
- Costantino A, Digregorio EJ, Korn W, Spayd S, Rieders F. The effect of the use of mouthwash on ethylglucuronide concentrations in urine. J Anal Toxicol. Nov-Dec 2006;30(9):659-662.
- Reisfield GM, Goldberger BA, Pesce AJ, et al. Ethyl glucuronide, ethyl sulfate, and ethanol in urine after intensive exposure to high ethanol content mouthwash. J Anal Toxicol. Jun 2011;35(5):264-268.
- Rosano TG, Lin J. Ethyl glucuronide excretion in humans following oral administration of and dermal exposure to ethanol. J Anal Toxicol. Oct 2008;32(8):594-600.
- Thierauf A, Gnann H, Wohlfarth A, et al. Urine tested positive for ethyl glucuronide and ethyl sulphate after the consumption of “non-alcoholic” beer. Forensic Sci Int. Oct 10 2010;202(1-3):82-85.
- Hoiseth G, Yttredal B, Karinen R, Gjerde H, Christophersen A. Levels of ethyl glucuronide and ethyl sulfate in oral fluid, blood, and urine after use of mouthwash and ingestion of nonalcoholic wine. J Anal Toxicol. Mar 2010;34(2):84-88.
- Reisfield GM, Goldberger BA, Crews BO, et al. Ethyl glucuronide, ethyl sulfate, and ethanol in urine after sustained exposure to an ethanol-based hand sanitizer. J Anal Toxicol. Mar 2011;35(2):85-91.
- Musshoff F, Albermann E, Madea B. Ethyl glucuronide and ethyl sulfate in urine after consumption of various beverages and foods–misleading results? Int J Legal Med. Nov 2010;124(6):623-630.
- Thierauf A, Wohlfarth A, Auwarter V, Perdekamp MG, Wurst FM, Weinmann W. Urine tested positive for ethyl glucuronide and ethyl sulfate after the consumption of yeast and sugar. Forensic Sci Int. Oct 10 2010;202(1-3):e45-47.
- Helander A, Olsson I, Dahl H. Postcollection synthesis of ethyl glucuronide by bacteria in urine may cause false identification of alcohol consumption. Clin Chem. Oct 2007;53(10):1855-1857.
- Helander A, Hagelberg CA, Beck O, Petrini B. Unreliable alcohol testing in a shipping safety programme. Forensic Sci Int. Aug 10 2009;189(1-3):e45-47.
- Sarkola T, Dahl H, Eriksson CJ, Helander A. Urinary ethyl glucuronide and 5-hydroxytryptophol levels during repeated ethanol ingestion in healthy human subjects. Alcohol Alcohol. Jul-Aug 2003;38(4):347-351.
- Jatlow P, O’Malley SS. Clinical (nonforensic) application of ethyl glucuronide measurement: are we ready? Alcohol Clin Exp Res. Jun 2010;34(6):968-975.
- Helliker K. A test for alcohol–and its flaws. The Wall Street Journal2006.
- Administration SAaMHS. The role of biomarkers in the treatment of alcohol use disorders. In: Advisory SAT, ed2006:1-7.
- Bodenheimer T. Uneasy alliance–clinical investigators and the pharmaceutical industry. N Engl J Med. May 18 2000;342(20):1539-1544.
- Bekelman JE, Li Y, Gross CP. Scope and impact of financial conflicts of interest in biomedical research: a systematic review. JAMA. Jan 22-29 2003;289(4):454-465.
- Stelfox HT, Chua G, O’Rourke K, Detsky AS. Conflict of interest in the debate over calcium-channel antagonists. N Engl J Med. Jan 8 1998;338(2):101-106.
4 thoughts on “Quacks Selling Snake Oil-EtG and the Big Con.”
I admire your research, your stamina, and your mind, doctor. I hope that there will be reasonable people who will be able to comprehend the impact of the information and not just see it as numbers and stop seeing with glazed over eyes, like a high school student shutting down under information overload. And I hope that policy will be rewritten to treat people more rationally and humanely. How discouraging, to be completely steamrolled, shut out, and then ignored rather than to be helped and encouraged in and through crisis! Is the training invalidated? Are the years of investment completely depreciated? Was the knowledge forgotten? We are all humans and that makes us prone to frailties and occasionally, failure. The oath should apply to everyone involved, understanding that doctors who enter addiction recovery were and still are human beings deserving to be treated with “warmth, sympathy, and understanding,” and not with “overtreatment and therapeutic nihilism.” While I agree there must be oversight, in medicine and in other fields, it doesn’t need to be crushingly overbearing. I hope you’re successful in your quest. ~DM
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[…] Source: Quacks Selling Snake Oil-EtG and the Big Con. […]
Very useful. Also disheartening…
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In which issue of New Scientist February 2007 did the Dr. Skipper comment appear?
I cannot find it.
Please let me know