Totally Wicked posted all their results online last night (UK time) for flavours and e-juice.
Totally Wicked e-liquid Test Results Summary
TW do also sell in the USA.Thank you. Excellent info for European members.
Digby's have posted results for all their juices on their site, on the product pages - they have made the comment:
We have found a trace amount ( less than 5 ppm ) of Acetyl Propinoyl in Mums Custard and while the amount is so small and does not pose any health risks we are currently working to make sure the recipe is free from this and tastes exactly the same.
Manabush have also published results
Manabush - Rich Sweet Tobacco Flavour Based E-Liquid for Vaping - Safety and Testing
They have said: We did detect small levels of acetoin in a few of the juices (mainly the ones with a custardy or buttery note). We are led to believe that it is not harmful in such levels (it occurs naturally in black currants, apples, butter, yogurt and asparagus) but it is thought that it could catalyse into very small amounts of diacetyl under extreme temperature. Manabush always recommends that our liquids are not vaped at too high a temperature to get the best flavour.
With knowledge available at present it would seem the risk from acetoin is small, we believe that you have a right to know that it is present in the liquids shown (as well as many other buttery and custard vapes). The truth of how harmful any of these chemicals are is hard to ascertain, all of the above mentioned chemicals can be found in traditional cigarettes - in larger quantities than normally found in e-liquids.
We are not unduly concerned with the trace amounts of acetoin found in a few of our liquids, but we are investigating reformulation of those liquids to try to eliminate it altogether in the future.
(not sure if these are available/ known or not in USA but are very popular in UK - apologies if already been posted)