Islam also has dietary restrictions, somewhat similar to that of Jewish people, perhaps because of their common heritage. They are forbidden to eat pork of any kind, similar to the Kosher prohibition of eating any animal that does not chew a cud and have a split hoof. A more practical reason for not eating pork is probably because swine, which have no sweat glands, cannot survive in a desert environment. Animals must be slaughtered ritually, namely by cutting the animal's throat. They are not to eat blood, horses, or the flesh of any animal that dies naturally. Alcohol is strictly forbidden. Also, during the holy month of Ramadan, devout Muslims do not eat at all i daylight hours, but normally feast after sunset. Ramadan is determined by the Lunar Calendar, and therefore does not coincide well with the Gregorian Calendar used in the West.
The dietary rules of remaining kosher are particularly interesting because they have been a part of Jewish culture and life for so many centuries.
Another more modern religion with dietary restrictions, though certainly not nearly as restrictive as remaining kosher, are mormons as they follow what they refer to as the "Word of Wisdom."
Mormons claim that Joseph Smith received a revelation that dictated several rules of health including abstinence from alcohol and tobacco, a restriction on "hot drinks," which has been interpreted as coffee and tea. The passage, found in the "Doctrine and Covenants" also suggested that members eat whole grains and eat meat only sparingly.
There are many religious groups that have special dietary laws. Here in the United States, the best known of these religions is Judaism. Judaism requires its adherents to eat only foods that are kosher. This is a complicated system with many requirements. Please follow the link for detailed information.
An example of Jewish dietary rules is that there are only certain kinds of animals that may be eaten. Of land animals, only those that are ruminants and which have a split hoof may be eaten. Of birds, the general rule is that predatory birds may not be eaten. Of marine life, only those with fins and scales may be eaten.
There are many more rules involved in keeping kosher. Please follow the link to read more.