We’ve discussed smoking and health a number of times recently:

• Smoking Cessation Timeline: What Happens When You Quit
• Irreversible Gene Expression Changes From Smoking

One of our readers asked a question I’m sure many have us have wondered about at one time or another:

Which is worse for the development of lung cancer — smoking heavily over a short period of time or smoking fewer cigarettes over many years?

Here’s what the research has to say: