Concentrated flavours have traditionally been mixed in a Propylene Glycol (PG) base as it’s a great flavour carrier. However, VG or Vegetable Glycerine is at times utilised by a few manufacturers . Many of the ingredients used in the production of flavours are FDA approved and certified as GRAS – Generally regarded as safe. However, this does not cover inhalation. It pertains to the use as food ingredients only.
Flavours contain hundreds of ingredients, many even a few thousand – Naturally extracted compounds and oils, water, sweetening agents, additives, alcohols and far more secrets than the Colonels 11 herbs and spices. A few examples of the chemical components are – aldehydes, ethers, esters, hydrocarbons (terpenes, sesquiterpenes, etc.), ketones, lactones, phenols, and phenol ethers.