Sorry what i meant is that i knew most of the flavor vendors started removing diacetyl ( or clearly marked the ones that still have them ) circa 2010. What i didn't know was that TFA has been testing for Acetyl Propyniol as well. It wasn't until a year or two ago that AP became a concern within certain segments of the industry as well, when Dr. F and others stated that the potential risk was identical.
There are actually 3 that are of concern... diacetyl, acetyl propionyl, and acetoin. TFA tests for all three.
I'll be one of the first to jump up with "but we don't know FOR SURE" -- but I try to avoid all three because I have asthma; a) my lungs don't need anymore strikes against them, and b) since the only real symptom of bronchiolitis obliterans is "shortness of breath", I would have no way of knowing if I was having a normal asthma attack or something far worse, and I tend to the paranoid/hypochondriac side.
Andria