"While non-filter cigarettes currently represent no more than 1% of cigarette sales ... with the result that their actual intake of tar and nicotine does not change when they switch.

Forty-eight hours after your last cigarette all carbon monoxide and most nicotine will be out of your body. Your ability to taste as well as your smell is also improved. The NHS website states ...

It works using a pump, a smoke collecting chamber, and a filter pad. As the cigarette burns, smoke passes through the filter. After one cigarette, the difference between a clean filter and a dirty ...