In addition to avocado, there are others fruits/vegetables that can bring health benefit,
like beetroot, kale (eat it raw), flaxseed oil pill, Extra virgin Olive oil (make salad), Turmeric (cumin) pill, Lutein pill,
Bio-calcium supplementary pill (old age people especially need this but not more than 600mg /day).

And eat variety of fruits/vegetables everyday, eat vegetables raw if possible.
(unless some cannot be eaten raw like potato, yam, peanut, bean...etc).