The age when you must give up smoking to escape the risk of lung cancer: Experts reveal the truth about what quitting does to your body in your 30s, 40s, and 50s... and the REAL impact of that one cheeky cigarette a week ⊖⊖

Today, smoking is widely considered to be one of the worst things you can do for your health. But experts say that quitting at the right age could prevent the worst of the damage.