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This is because it has nicotine, PG, and other chemicals that leave behind residue that eventually turn yellow

They also are easier to grip

Look for ones made with xylitol, as it supports saliva flow and helps manage bacteria, especially if you still have some natural teeth

Gunduz I, Kondylis A, Jaccard G, Renaud JM, Hofer R, Ruffieux L et al (2016) Tobacco-specific N-nitrosamines NNN and NNK levels in cigarette brands between 2000 and 2014

Oncol Res 25:137145 Suk M, Kmmerer K (2023) Towards greener and sustainable ionic liquids using naturally occurring and nature-inspired pyridinium structures

let the decoction settle, and draw off the clear liquor