Nicotine still affects the heart, blood vessels, and brain chemistry, and low-quality formulations can lead to gum irritation, heartburn, or digestive discomfort
Legal disclosure of nicotine and tar levels
N95 masks provide excellent protection against smoke particulates but offer no protection against toxic gases commonly found in fire smoke
The initial dip in TER observed in all control (CTRL) samples around 4 h post-exposure, followed by recovery, suggests that the cells may be sensitive to the exposure conditions, including the impact of cigarette smoke-free control air, and due to being kept outside the incubators
However, quitting smoking improves recovery outcomes