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Nicotine and quitting, explained

Clear, sourced answers to the questions people search most when they are thinking about quitting. No jargon, no scare tactics, just what is happening with nicotine, withdrawal, and cravings, and how long each one lasts.

Nicotine and your body

How long nicotine stays in your system Nicotine half-life

Withdrawal and cravings

Nicotine withdrawal symptoms How long cravings last Why you feel worse after quitting

Understanding it is half the battle. The app is the other half.

SmokeFree AI puts a coach and a craving rescue in your pocket. Launching August 15, 2026 on Android.

Launching August 15, 2026

Sources across these pages: NHS. General information, not medical advice.