Dear J.F.:
Free Spirit was at least honest enough to acknowledge his confusion. Most of his confusion comes from simply not reading my post carefully enough. But, a basic food science class might help also. Let me clear things up.
My suggestion is that you eat foods in their natural state as much as possible. This way, the food will have its original nutritive value. Once food is processed, or denatured, it loses much of its nutritive value, and is composed primarily of empty calories. The problems with eating such food are well known; such food should be avoided.
Now, during your hike, you’re going to get the calories you need one way or the other. What I’m suggesting is that you get them by eating natural, nutritionally dense foods, rather than empty calorie foods. Simply put, calories aren’t the only things you need out of food.
Now, why do I suggest vitamin and mineral supplements on top of the nutrients you would get out of natural, unprocessed, or minimally processed foods? The answer is simple and straightforward. You will likely not be able to find such foods at all times.
Now, why not eat fortified cereal? Not because there are vitamins in it. Rather, because the platform for the vitamins, the cereal itself, the grain it is made from, has already been denatured.
Hope that clears things up.
Sincerely–Conan.
Conan