From diet products to home makeovers, nothing illustrates a change like a “Before & After” shot. But when it comes to quitting smoking, there’s a lot more to see than just a healthier lung. For a real picture of how quitting will change your life and outlook, take this short quiz, when you’re done, print it out. Then, we’ll send it to you to take again in 12 weeks. We think the changes will be as clear as any photo.