Hi I’m a physician in recovery. I completed a five year contract with my state for monitoring and now I voluntarily continue monitoring. In the past 6 years of sobriety I have had 2 PEth tests come back positive and I’m at a complete loss to understand how that is possible. I chew sugar free gum and drink diet sodas so I’m wondering if the “sugar alcohols “ can play a part? So much of the literature accepts the results of this test as true, but I know for sure in my case that it is wrong. Anyone have thoughts?