From Mrs. T's website:
What ingredients does Ms T use?
Our products contain Vegetable Glycerin (VG), Propylene Glycol (PG), and FDA approved food grade flavorings. Nicotine is added as requested. If 0mg juices are ordered, they are guaranteed to contain NO nicotine. Ms T uses only flavors that are approved on the e-juice calculator found on ECF, and of those, only flavors that are made in the USA. All juices are mixed personally by Ms T herself, in the United States. All flavorings used in Ms T's juices are completely free of diacetyl.