Today, a lot of people believe that many aspects of kashrut were based on health, however, Jewish records don't support this claim. The types of food that can and can't be eaten according to kashrut doesn't support this claim either.
In truth, the laws of kashrut delineate our relationship with food. Kashrut doesn't only specify what we eat, but also how we eat, and when we eat or don't eat.
Please see the related link for a detailed explanation.
They can eat a kosher diet, and be slaughtered the kosher way.
Kosher, when dealing with food and diet, simply refers to rules for the preparation and consumption of food. It has no bearing on the quality of diet itself. As such, there is nothing intrinsically good or bad about a kosher diet in terms of health.
The general meaning for kosher is "clean/fit or proper" and if you relate this to the cabbage soup diet, yes it is kosher and can help you stay healthy.
Keeping kosher.
Keeping kosher.
Leviticus 11
Yes.
No. Emu meat is not considered kosher because emu resembles ostriches which are not kosher as well. (The rhea and the cassowary are not kosher for the same reason.)
See the links.
Judaism. See also:http://judaism.answers.com/jewish-laws/laws-of-keeping-kosher
There is nothing non-kosher in the ingredients for peanut butter and there are several brands of peanut butter that are certified kosher.
Kosher is the diet of Jews. Jews keep kosher. If you keep kosher you cannot eat: shellfish, pork, or dairy mixed with meat. The main land of Jews is Israel. So technically, the nationality of kosher is Israel.