The human body has a history of starvation. Namely, primeval humans had to work for their foods, so the body eventually became equipped to difficult labor, coupled with a constant hunger for food. After all, when you don't know when your next meal is, your body is bound to start giving you signs.
However, these days there is hardly any work involved in feeding your body. Minimal work is needed to earn the money to buy food, and even for people who don't earn enough, there are volunteer and charity organizations to distribute food equally among all people of the population. Essentially, in most of the domesticated world, the hunger problem has been resolved.
However, there are still people who don't have regular eating schedules. People who are often busy, waking up at the brink of dawn and going to sleep late, haphazardly snatching naps throughout the day while working all night long, having no sleep for days on time -- these unnatural patterns can cause distress to the circadian rhythm of the natural body.
It's best to leave nature to do its own part, but when there is so little that you can possibly do in order fix up your life, the sad truth is that your metabolism is what pays. You may remember this from high school biology -- the way the body takes in nutrients and turns it into energy. This is where all of those calories you had consumed throughout the day go to do their work and show off how important they really are. This is where you find the strength to stay awake and basically perform all of the functions necessary for life.
So, what about people who don't have regular diet schedules? The best course of action is to develop a plan where you can have regular meals around 3-4 hour intervals. Otherwise, your body naturally sets itself in "starvation mode," essentially messing up your metabolic rates. The way the body processes energy is that the more it intakes, the more it outputs. When there is more regular meals, then it's able to function at its highest capability. On the other hand, feeding your body too much at a time is like stuffing a funnel with a thick, viscous liquid. Eventually, the opening jams and nothing comes out.
Anyway, there's a lot of different ways to approach this issue. One way I've found to my liking is the "French Diet." Dubbed a mystery by many dietitians, it's based on the idea that although the French eat many carbs and sugars, i.e. croissants, brioche, crepes, they are able to maintain a relatively healthy diet. The main idea that has been thus theorized is that they eat regular meals and they don't snack in between. This way, their metabolisms are able to function at their best and thus process the food as a healthy body should.
I apologize if these ideas came as random spurts, but I've been having these thoughts for a while. There's a trend going on among over-achieving high school students to skip lunch and I was wondering just how terribly this could mess up an entire day's diet. Skipping a meal sets your body to believing that food is scarce, and thus it tries to retain its fat. This is essentially starving yourself, even though it may not seem so at the time, but there is evidence that not eating throughout the day can impact your performance -- negatively. Nevertheless, the lunch issues is definitely a debate that should remain internal to high school students.
Breakfast: Coffee, cereal
Lunch: Broccoli, peaches
Dinner: Yams, pumpkin, cucumber salad