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And when we dont get good quality sleep and particularly if were not getting good quality sleep because our airway gets closed and our brain and our body have to maintain enough awareness to try to open up the airway that is very, very hard on the vascular system, Lloyd-Jones says

Frequent cannabis use is becoming more widespread and will likely continue to rise with changing social norms, policy liberalization, and the increasing availability and promotion of cannabis products, McGraw noted

Theyre exposed to much more smoke over a greater period of time. When you smoke a hookah, very little nicotine is filtered out when the smoke passes through the water

Patterns of Electronic Cigarette Use and User Beliefs about Their Safety and Benefits: An Internet Survey. Drug and Alcohol Review 32(2):133-140

But as we've gotten more sophisticated, moved to second- and third-generation devices, as the voltage has increased, what we've seen is propylene glycol actually turns into formaldehyde at really high temperatures