I am quoting this from the NF's website:
"The processes for creating organic flavors are much the same as for making natural flavors. The difference being ingredients are organic rather than purely natural. Only certified organic ingredients are used when available. When not, natural ingredients may be used provided they fit within the definition of "natural" and comprise less than 5% of the total amount. This is referred to as 95% organic. 100% organic means only certified organic ingredients are utilized and nothing else. Nature's Flavors carries both 95% and 100% certified organic flavors. It is our goal to produce only 100% organic flavor concentrates and extracts as the ingredients become available.
In many instances we produce our own organic ingredients to satisfy our strict quality control requirements. Steam distillation is a common and often used method for manufacturing our unique flavor concentrates and extracts. This process allows us to create our flavors without chemical residues because no chemical solvents were used in the process. Many organic flavoring ingredients are derived this way before being incorporated into water or oil based organic flavor concentrate. The entire process is safe and effective for producing the finest quality organic flavor oils, concentrates and extracts."
and
"What is an Organic Flavor Extract? Nature's Flavours' Organic Flavor Extracts are water soluble flavors made in a base of Organic Ethyl Alcohol. These all natural Flavor Extracts are Certified, Organic, Food Grade, Kosher, Vegan, Gluten Free, and contain NO Allergens. They are best used in clear beverages, dairy products, and applications where you don't want to disturb the clarity/translucency. Nature's Flavours' Extracts are of comparable strength to our Organic Flavor Concentrates, and Organic Flavor Oils. Nature's Flavours' Organic Flavor Extracts are flavors only and will need to be placed with a sweetener, fat, or something with high alkalinity like salt, for them to really burst in your mouth.
Flavor Extracts are Water Soluble? Our Organic Flavor Extracts are pure Water Soluble Flavors, this means like our Organic Flavor Concentrates they will readily dissolve into water based applications. We do not recommend adding Flavor Extracts to an oil base, as separation may occur. For Oil Based applications we recommend our Oil Soluble Organic Flavor Oils, and our Organic Flavor Oils for Chocolate.
What about Extracts in high heat applications? It is important to note that flavors and colors will become less potent when exposed to high heat applications. Nature's Flavours' Organic Flavor Concentrates are more heat stable than our Flavor Extracts. We also offer Natural Flavor Emulsions for High Heat Applications!"
I am very interested in NF's products. But, my concern is diketones. They make little mention of them probably because their products are specific to food, not to ejuice. They can say that their products do not have dikeotnes, which really only means that they don't add any to it in the extraction process. It's the same as saying organic. A company can claim a product to be organic at only 95%. They have a diacytel free line of flavors. But, they can claim diacytel free with some still present.
For NF's, organic means the original products from which the extractions were made, are certified food organic, and are without artificial sweeteners, dyes, extraction chemicals, are kosher, gluten free, dairy free. This is awesome - if they indeed contain absolutely no diketones.