How big are the cigarettes, how deep do you inhale, how strong are the cigarettes you smoke, type of filter... So many factors. But no simple X is safe and X+

How big are the cigarettes, how deep do you inhale, how strong are the cigarettes you smoke, type of filter... So many factors. But no simple X is safe and X+n is bad formular to appease any concerns. Everybody is different and all these Recommended Daily limits are all based on an average that none of us fully fit into. I will say though that anything in moderation is the only rule of thumb that still carries, after all - stress does kill and if by not having a few cig's you increase your stress then you may find that your reducing your health even more due to the stress. Moral being, be happy and if you have to question it, then you already know the answer that's best for you.