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At 30

If you quit at 30, you gain almost 10 years of life expectancy. Your risk of dying from smoking-related disease drops to nearly zero over time. Your lungs have decades to recover. This is the highest-leverage quit you can make.

At 40

Quitting at 40 adds about 9 years to your life. Your risk of heart disease drops to that of a non-smoker within 15 years. You'll likely avoid the worst consequences — COPD, lung cancer, heart attack — entirely.

At 50

You gain about 6 years. Your lung function stabilizes and may slightly improve. Your cardiovascular risk drops significantly. Most of the damage is still reversible at this stage.

At 60

Even at 60 — after decades of smoking — quitting adds 3-4 years and dramatically reduces your risk of heart attack and stroke in the near term. Your quality of life improves within weeks.

The Bottom Line

There is no age at which quitting doesn't help. There is no amount of damage that can't be partially reversed. Your body wants to heal. The only thing stopping it is the next cigarette.

Start today. Whether you're 25 or 65, the best time to quit was yesterday. The second best time is right now.