Which brands contain diacetyl in their vape juice? Knowledge Kaiweili Digital Technology DYK? Vaping coats lungs with potentially harmful chemicals. This can include chemicals such as: Diacetyl: This food additive, used to deepen e cigarette flavors, is known to damage small passageways in the lungs. How do I figure out if my vape juice contains diacetyl or not? : r Vaping Which brands contain diacetyl in their vape juice? Knowledge Kaiweili Digital Technology Best Diacetyl Free Vape Juice for Safe Vaping in UK A Warm, Buttery Flavor and a Risk of Irreversible Lung Damage