Because cigarettes deliver nicotine very, very fast, giving an instant and pleasant rush. After an hour or so the nicotine level in your blood has fallen quite a lot and you'll be craving another one.
E-cig nicotine delivery happens slower and you avoid both the highs and the crashing lows. That makes it a lot easier to cut down to insignificant amounts of nicotine over a few months.
E-cig nicotine delivery happens slower and you avoid both the highs and the crashing lows. That makes it a lot easier to cut down to insignificant amounts of nicotine over a few months.