I think that under modern material conditions, most of what we eat has reached or exceeded the energy level we need. What you really need to do to live a long life is two things: a balanced diet and a healthy work and rest.

Whether you eat corn or rice, you should pay attention to all aspects of a balanced diet. I think everyone needs different amounts. We should take protein, vitamins and various trace elements reasonably according to our own needs. I suggest reading magazines and scientific reports about eating health.

Staying up late less and exercising regularly can keep you healthy and strong. China is a place that pays attention to health preservation. Drinking tea, playing Tai Chi and eating all kinds of strange plants are actually very unreliable. Even if you are lucky enough to do it right, you can only keep it at most. Even if you raise it, you can't develop yourself. In this respect, I think the western scientific method is more reliable. So, of course, you can skip the rice. You can take corn, bread and noodles as staple foods, which are essentially the same.