Is it too late anyway to become healthy if you quit smoking cold turkey at 43?

Never too late: Recovery never happens too late. Cold turkey is not the most gentle method of detoxification. You might consider using the nicotine patch and attend meetings of nicotine anonymous.

Never too late.: As far as quitting without any nicotine replacement, the cold turkey method is great. But plan it ahead of time. Pick a quit date in advance, maybe a meaningful date like a birthday or holiday, and gather people who are aware of your attempt that you can call upon for moral support if you start to falter. Good luck!! It's never too late to try to get the health benefits of quitting smoking.