Is it possible to live comfortably in old age?

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I read about a woman who was very old, at her time of death she was over a hundred years old and her prayer for 20 years before her death was to die a painless death. Her death was almost painless IF not painless. I don't remember how she did but I know she did not suffer that much when she died.

I read that rats who practice fasting (in scientific experiments where they are deprived of food) - live longer than regular rats and die of old age rather than from sickness or disease.

Do you think its possible to die painlessly?
Is it possible to live comfortably in old age?
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