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Nicotine salt e-liquid contains a mild acid that causes the nicotine to revert to its original salt form and reduces the alkalinity of the e-liquid, making it smoother

Despite the therapist expressing concerns in the logbook entries about the patients level of active participation in therapy, the patients commitment to the OBT suggested a high level of participation

Over time, your body becomes accustomed to nicotine

The chemicals in cigarette smoke damage blood vessels, leading to atherosclerosis (hardening and narrowing of the arteries) and an increased risk of blood clots

The epidemic of tobacco deaths will progress inexorably throughout the world until and unless tobacco control is recognised as an immediate priority for development, investment, and research. Dr Emmanuela Gakidou, a senior author of the study, said: There have been some success stories, but smoking remains the leading cause of death and disability in 100 countries in 2015. Join our commenting forum Join thought-provoking conversations, follow other Independent readers and see their replies Comments

As your body adjusts to life without cigarettes, appetite levels tend to stabilize