A diet rich in rusty nails will remedy most iron deficiencies. Be sure you are up to date on your tetanus shots.
Yogurt will prolong life indefinitely. If you know any people who have died, it is because they forgot to eat their yogurt.
Swedish rye crispbread is high in fiber. We can say that much for it, anyway.
Beans have no nutritional value until they are doused in brown sugar.
Ask your grocer whether kale is right for you. In some states it is available without a prescription.
Granola can be made into a complete source of protein by adding it to ice cream.