Hello Luvr,
VG and PG are used for all kinds of other stuff beside vape juice.
VGis widely used in cosmetic products, foods and as a replacement for alcohol in herbal and botanical tincture.
Propylene glycol is used by the chemical, food, and pharmaceutical industries. The FDA has classified propylene glycol as an additive that is "generally recognized as safe" for use in food.
Several people here use it to make soap, food, cake icing, ETC
Don't worry about that but if you're still going to worry:
4 Gallons PG-VG Crazy Pricing: Essential Depot
4 Gallons should last you a little while