The amount of cigarettes a day that is not harmful is 0 cigarettes a day.
Even 1 cigarette per day is harmful especially if you smoke one everyday of your life.
Smoking cigarettes is harmful no matter how many you smoke per day.
However when you smoke a pack or more of cigarettes a day it gets even more harmful and worse for your health.
The best thing to do is to avoid smoking cigarettes at all and if you do then work on quitting smoking.
When I turned 18 I started smoking cigarettes but after a few years I just decided to give it up.
My dad was a smoker and he now has COPD and breathing issues and has to use an inhaler and he's 74 years old now.
He smoked since he was 16 years old and his mom smoked and died of lung disease at age 70 and she would smoke a lot.
My dad quit smoking 15 years ago and has never smoked a cigarette again.
Smokers have breathing issues and die earlier than non smokers.
My aunt died a few years ago at age 68 and she was a heavy smoker as well.
She was on oxygen and still smoking when she died.