X xxxMMAxxx New member Jan 22, 2011 #1 iv been a pack a day smoker for 4 years and am trying to quit so i can run a half marathon in april, can they really replace cigarettes and are they really harmless to your lungs, also whats the best one
iv been a pack a day smoker for 4 years and am trying to quit so i can run a half marathon in april, can they really replace cigarettes and are they really harmless to your lungs, also whats the best one
