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Can ketosis cause false positives on DUI breathalizers?

Posted Sep 12 2008 8:59am

I ran across a blog entry claiming that a low-carb diet can cause false positives on breathalizer tests. They include links to a couple of sites making similar claims.

This gist is that when the body produces ketosis as it burns stored body fat for energy, consumption of carbohydrates during ketosis can cause the body itself to produce a substance called isopropyl alcohol. Most DUI breath testing machines cannot distinguish isopropyl alcohol from ethanol (the alcohol that we drink and that causes impairment).

Has anyone heard this before? Is it for real or just an urban legend?

Follow-up March 23, 2007:

Here's addiitonal information from the International Journal on Obesity...

Follow-up May 24, 2007:

Here's addiitonal information from the blog of Dr. Michael Eades, co-author of Protein Power...

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