While driving in California recently, you passed through a DUI checkpoint and blew into a breathalyzer. You did not have a drop to drink, but the device registered alcohol in your blood. Was the device faulty?

As explained by Men’s Health, your keto diet could be to blame. Understand how your health regimen can inadvertently put you on the wrong side of the law.

What happens in your body during the keto diet

During ketosis, what happens is your body converts fat into fuel, a process that produces something called acetone. Your body flushes the byproduct from your body through your breath in the form of isopropyl alcohol. Where the breathalyzer confusion comes into play is when the device cannot differentiate between isopropyl alcohol and ethanol alcohol.

Taking breathalyzer tests one step further

If you are on a keto diet and taken to a police station after your arrest, try not to panic. Usually, those arrested for DUI receive a retest on an infrared spectroscopy machine, which has an easier time differentiating between the two different types of alcohol. If using the infrared spectroscopy machine is not an option, you can ask for a blood test.

Additional conditions that may lead to false breathalyzer positives

Besides the keto diet, other conditions can cause a breathalyzer to render a false positive. For instance, those with diabetes, acid reflux and GERD can confuse the device. If you know you have any of these conditions and cops pull you over on suspicion of drunk driving, request either a blood test or the use of an infrared spectroscopy machine.

This information is only intended to educate and should not be interpreted as legal advice.