Choose a diet low in fat, saturated fat , and cholesterol. Choose a diet moderate in sugars. Choose a diet moderate in salt and sodium. If you drink alcoholic beverages, do so in moderation. If we don't reduce our intake our weight will go up.
Protein needs increase.
That something is saturated fat. Most older people, like the rest of us, do need more oils, though. Iron needs remain high. Probably a large percentage of older people are deficient in iron. Remember that the iron in meat is more easily digested than that in grains and vegetables.