I posted this in Brew Science because I figured it would just turn into a debate about whether or not 5.2 stabilizer works if I put it in the Sanitation forum....but here we are... There are countless threads about how and why it doesn't work (see similar threads below), I was hoping someone who knows something about microbiology could chime in about the effectiveness of Star San at sanitizing or how to go about testing it. Personally, I haven't had an obvious infection since I started using star san a couple years ago but I doubt the claim that it doesn't add any taste to your beer. Get 2 glasses, rinse one in star san and then fill them both up...you can taste it...whether or not that taste will fade is a little harder to test.