Cotinine levels in saliva have been reported to increase with high nicotine concentrations in e-liquids, and significant cotinine levels have also been found in nicotine-free e-liquids [17]
Similarly, in terms of respiratory health, studies have noted improvements in lung function and pulmonary ventilation and decreases in airway resistance among smokers who switched to e-cigarettes [41, 42], pointing to a potential benefit in reducing the harm caused by tobacco smoke
These studies related to e-cigarettes behaviour and awareness were carried out in seven Arab countries, including Saudi Arabia, Jordan, Egypt, United Arab Emirates (UAE), Lebanon, Tunisia, and Qatar 19-54
Cigarette and marijuana smoke have distinct odors that can alert other people in your home to what you are doing