There are none.
As long as the utensils and machinery is uncontaminated the food is kosher. This only applies to food that was kosher to begin with. The most well known sign is OU, which is an U on a circle. Any food grade packaging companies like http://www.robertsonpackaging.com do not have any food in their production facilities as they are completely sterile so all packaging to start with is kosher, the only way this would change is if the company that filled the packaging used non kosher products in them.
One can purchase food that is kosher at bakeries that are supervised by rabbis. This will ensure that the food is in fact genuinely kosher. Also, some foods may carry a "hekhsher" symbol on the packaging. If the symbol is on the packaging, the food is kosher.
on food packaging, it signifies that the product is kosher.
Yes, magi magi is kosher as long as it is produced following kosher guidelines and does not contain non-kosher ingredients. It is always advisable to check for kosher certification on the packaging to ensure it meets kosher requirements.
There are brands of kosher imitation crab meat. You would have to check the product packaging for kashrut certification.
The actual word is 'kosher', not 'kosha'. Kosher refers to food that is prepared following the laws of kashrut (Jewish dietary laws). A kosher kitchen is a kitchen that is set up so that it meets the requirements to produce kosher food.
It can be. You'd have to check the packaging for kosher certification.
You can tell if any commercially produced food item is kosher if it has a valid 'hechsher' on the packaging. A hechsher is a symbol that is associated with an organisation that certifies a food manufacturer is kosher. Please see the related link for commonly accepted hechshers.
There are kosher brands of l-taurine supplements. You would have to check the packaging for kosher certification.
There is no such thing as "koshered food". Kosher food is food that is acceptable for Jewish consumption because it follows the Torah and Rabinnic requirements for food preparation. Koshered appliances are cooking implements that have been sufficiently cleaned so that they can prepare kosher food without contaminating the foods with non-kosher elements and thereby rendering the food treif (un-kosher).
Yes it is. Now there is a distinction between what is Halal (permitted) and what is Thabeeha (Islamic slaughtering of meat which has certain specific requirements that may not be done in Kosher slaughtering). But permitted would be anything that is truly Kosher.
Not much difference - Halal is practiced by Muslims, and Kosher is practiced by Jews. Neither eat pork, and each have requirements on how their meat is slaughtered and processed.