Fruits suitable for the elderly mainly include apples, oranges, pears and saints fruits, as well as kiwi, grapefruit, bananas and watermelon. Apples and kiwis are rich in vitamin C, vitamin E and other substances, which have the functions of scavenging oxygen free radicals, antioxidant, enhancing immunity and preventing colds. Pears are suitable for elderly people suffering from chronic bronchitis, as well as chronic obstructive pulmonary disease, because they have the effect of expectorant and lung moistening. The sage fruit is the only fruit suitable for elderly people with type 2 diabetes, because it does not contain sugar and basically does not affect blood sugar. Grapefruit has a softening effect on blood vessels and is suitable for elderly people with high blood pressure. Banana has a laxative effect and is suitable for elderly people suffering from constipation. Watermelon has a diuretic and decongestant effect, and is more suitable for elderly people with cardiac insufficiency.