Vape juice contains a long list of chemicals, many of which aren't even listed on the packaging. Testing has also shown that vapes labelled "nicotine free" can have high nicotine levels. Which E Juices Have Diacetyl? VanGo Vapes Vaping lung illness: Harmful chemicals found in e cig flavoring juice The FDA doesn't know if flavored vaping chemicals are safe to breathe Salon.com The vibes ain't giving with vaping Sorry, not sorry!! . Unfortunately vape juice or e liquids which vaping devices use to make the vapor you breathe in, isn't juice just water, flavouring