the addictive ingredient of cigarette smoking is Tobacco addiction signs, symptoms, and treatments All About Nicotine Addiction -

Nicotines effect is acute and short-lived, and with repeated exposure, nicotinic receptors desensitize, meaning the ability to stimulate VIP release fades over time

Instead of inhaling smoke or vapor, the nicotine is absorbed directly into your bloodstream through your oral mucosa, providing the same stimulant effect without combustion, tar, or odor

Cigarette smoking exposure breaks the homeostasis of cholesterol and bile acid metabolism and induces gut microbiota dysbiosis in mice with different diets

Effect of Gudakhu (smokeless tobacco) on periodontal health: A case-control study

Drug metabolizing enzyme and transporter gene variation, nicotine metabolism, prospective abstinence, and cigarette consumption