Well, I disagree with you. I think it's highly responsible of them to test their liquids and publish their findings. As I stated, the levels were low to non detectable. Vaping has always been about harm reduction. Never about risk free "smoking". there is no evidence that diacetyl has produced any illness or disease in any vaper and it has been around for as long as liquid has been produced. The issue of DA (diacetyl) and AP (acetylpropionyl) in e-liquid really gained some traction with the release of a study investigating its presence in e-liquid by Dr. Farsalinos and colleagues. Based on an analysis of 159 e-liquids and concentrated flavors expected to contain the chemicals, the study found that around 74 percent contained either DA or AP. The median daily exposure for vapers was calculated to be 56 μg (1 μg = 1 millionth of a gram) per day for DA and 91 μg per day for AP, which are 100 times and 10 times lower than the exposure for a smoker, respectively. is it avoidable? Probably, if you can get manufacturers to test and publish their results. Without that, you have no way of knowing if your juice contains it and to what levels.Ive said it before. Vaping is not risk free. And guaranteeing that there is no DA or AP does not in and of itself make it risk free. This is about harm reduction. DA has been singled out, but is not the only issue. And I don't care what claims are made, this is still the wild frontier and you vape at your own risk. I'm not here to defend diacetyl. I'm trying to put perspective on this topic.