This is his response,
"No acetyl propanol, and or diketones are used. First Creative Ingredients is our Food Flavoring Company. My two partners in Flavor Revolution owns First Creative Ingredients, but we opened an entirely separate company several years ago (Flavor Revolution) just for specializing in flavoring for the Vape Industry. We have focused from day one on the cleanest flavors we can make and consistent extracts without putting in chemicals that were known to be bad. We have never put these chemicals in or diacetyl(diketones) in our flavors.
Flavor Sweet is a high sugar substitute which First Creative Ingredients owns the trademark too. Flavor Sweet is the Brand Name and is not used at all in e-liquids just for sugar substitute in the food and beverage industry.
Flavor Revolution is dedicated 100% to making extracts for the e/liquid industry. We have 25 years + experience in the food industry. Hope that helps!"