Additional Flavour Concentrates
Apart from TFA and Capella's offerings, both FlavourArt and Flavorah are transparent about their ingredients, and both contain no additional diketones in their flavours. There are others, and I will be working on a post providing detailed information soon. Here are some links to these flavouring companies and their ingredients -
The Flavor Apprentice ( TPA/TFA)
TFA Custard Notes
It is worth mentioning again, that all flavours that provide us with that buttery, custard or vanilla flavour, have some levels of diketones or custard notes. They may not be added to the formulas, but as they form naturally in nature, even tiny traces will exist.
So, should we or should we not?
It is not my intention to dispel scientific findings or recommendations by those qualified to offer them. However, I feel in contrast to smoking, vaping flavours with diketones is still a significantly less harmful alternative.
Today, more and more of these concentrates are being offered with safer alternatives, such as Acetoin and Butanoic Acid. Some are even devoid of additional custard notes. For peace of mind, and just to be on the safe side, if the option is there to purchase these lower risk alternatives, one should at least try them.
Even though many remain on the fence, one should evaluate their vaping habits first. Is it your intention to vape long-term? How often do you vape e liquids that contain these custard notes? Are you a high wattage user, and or do you direct lung? Do you even inhale?
There are many variables that could exacerbate any potential risks, but when all is said and done, only you can make the decision. Personally, I limit my usage of concentrates with added diketones, and the ones that have natural traces, I pay them no mind. I have also been replacing some of the more high content diketone flavours with alternatives, and for the most part, they're perfectly acceptable and still provide the yumminess.
From The Table
It's all about the juice..
References and Research: