I've just read the 'Why Quit' section, it states:
48 hours There is no nicotine left in the body. Taste and smell are greatly improved.
This is absolutely NOT true at all and I've come across such mis-information on other quitting websites. It is an established scientific fact that it takes approximately three weeks for the body to purge 99% of Nicotine from the blood stream.
Chemical withdrawal lasts up to three weeks, it is generally accepted that cravings diminish in their intensity after three days but to suggest that all nicotine leaves the body after 72hrs is plain wrong.