If you have had a diet of a lot of fat and sugar for 33 years is there any point in changing to a healthy diet now?

The damage to my body is done. So I may as well just eat the way I am, enjoy the junk food and die young.
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@Paris13 what do you think.
If you have had a diet of a lot of fat and sugar for 33 years is there any point in changing to a healthy diet now?
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