A study was conducted a few years ago that proved this to be true. Lab rats were healthier and lived longer. There are people who do this who swear by it. Most people, however, do not have the discipline to eat the right food at the right amount to make it work. The only thing we understand is the "eat more often" part of it, but we ignore the parts about what to eat and how much to eat.
Don't know how many calories I am taking in. I can tell you the items I am eating each day. Veggies like cauliflower, broccoli, carrots, spinach leaves and kale. The manner of preparation varies between steaming and raw.
Tree nuts are high on my list. Cashews, almonds and pistachios are high on the list. Pecans are a tad bitter to me, which is a shame as the Alabama landscape is littered with pecan trees.
Meat is a good thing. Lean meats and fish are good.
Oh, remember what the doorbell said, feed your head. Olive oil, coconut oil, avocados; your body and especially your brain needs these things.
Matter of fact, eating smart will tune the body to where you won't take in as much, anyway. I notice I bring back food from work. That used to never happen. I'm stilling trying to get my wife to cut back on the amount so we aren't spending quite as much on the food bill.