I have often been puzzled by the popularity of various protein bars. Usually they contain one the cheapest, most processed, and least desirable of proteins—soy protein. They also include a variety of nuts, various sweeteners, perhaps some dried fruit, a variety of chemicals, and are usually low-fat or no fat. There are some more natural varieties, but even these do not come close to the ultimate protein bar—a slice of traditional cheese.
Traditional cheese, made from good, truly natural milk, with all of its natural fat, is fermented, which creates additional nutrients. Dry cheeses can be carried around in a wrapping, providing wonderful nutrition when opened and eaten. Such cheeses are rich in easily digestible protein, and have the natural fat that should always be eaten with protein. In addition to this, these cheeses are rich in many minerals such as calcium, and have a rich vitamin content, some varieties being especially rich in Vitamin K, a nutrient that is hard to get in our modern world.
Traditional cheese is often extremely tasty and satisfying, while providing a full range of vital nutrients. There are a huge variety of these traditional cheeses, so it is impossible to be bored, and some are so good that it is impossible for me to tire of their taste.
Many armies, from the ancient Greeks and Romans, up to the French Foreign Legion in the early twentieth century, would provide hard, dry traditional cheeses to their soldiers as part of their field rations. Shepherds and travelers in ancient, medieval, and even early modern times would often carry cheese with them so they would have something really good to eat while watching the sheep, or on their journey. Using cheese as a protein bar is a very old tradition.
If I am going somewhere and need instant nutrition available, I always pack some hard, dry cheese, never a protein bar.