most helpful answer yes moderate smoking is still harmful. that is like asking how much poison should i take every day before it becomes harmful. you are nearly a non-smoker so why not just go all the way and stop completely? stopping things that you enjoy are difficult i know but in the case of cigarettes there are really no safe limits. secondary smoke and even third-hand smoke has been found to be harmful so even a pack a week is going to cause problems over time. clearly the more cigarettes that you smoke the worse your risk becomes. while you are pleased to have cut down our 1/2 pack a day habit to a pack a week you need to do your body one more favor by stopping altogether. you can do it.
how harmful is smoking 1-3 cigarettes a day (less than a pack a week) compared to smoking more than 10 cigarettes a day? . is there such a thing as "less harmful smoking qty" i. e. few (1-3) cigarettes a day say after a meal or with a cup of coffee etc. i have been at that level of smoking for the last 3 years now knowing the i smoked regularly (more than 10 a day) for a period of 25 years until the age of 40. i am now 52 and generally healthy eat extra healthy diet and excercise regularly. is moderate smoking something to really worry about?