Problem is, they literally tell us to refrain from using mouthwash, cough syrups with alcohol in it, and other things like vanilla extract. Problem with the ETG test is it tests for ETG so anything with ethanol will show up. :/. My bottle only says tamoxifen citrate 30 ml at 20mg/1ml. I did send an email to the company askingThat is true sometimes. Depends on the supplier and it'll usually say in the description. But really were talking about 1ml (usually) for dosing. That's so minimal, you could just be like I use mouthwash every morning. I'm sure there's a threshold for the testing and 1ml will be under it.