Is it safe to make your own vape juice at home
The participants in the subsample 2 were first measured for expired CO with the Micro Smokerlyzer (Bedfont Scientific Ltd, Kent, UK), after which they completed questions about their tobacco consumption, the QSU-12, and the FTND
This is where misunderstandings arise: an herbal vaporizer (for dry herbs or concentrates) is technically and in terms of use different from an e-cigarette (for liquids, often containing nicotine)
The primary products under this category are e-liquids (also known as vape juice or e-juice), which are solutions typically composed of propylene glycol, vegetable glycerin, flavorings, and nicotine
"Federal Trade Commission Cigarette Report For 2004 and 2005" (PDF)