I think it's better to enjoy life than worry about nutritional guidelines, which might extend our time in some retirement home. Especially something that's been in our diet for a long time. Just don't overdo it.
My in-laws, who have always regularly exercised and eat healthy are 10 years older but have a much higher quality of life than my parents who have done neither.
It's about staying out of the retirement home for as long as possible not how long you're there before you die.
Looking after your health can be an important component of being able to enjoy life well before the retirement home. Plenty of people are having heart attacks and strokes before age 60, before age 50.
It's about staying out of the retirement home for as long as possible not how long you're there before you die.