Islamic law explicitly forbids alcohol. Halal refers to any object or action that is permissible according to Islamic law. To be considered Kosher, a Sabbath-observant Jew must be involved in the entire winemaking process from the harvesting of the grapes, through fermentation to bottling. This is not the case with [yellow tail] wine. In the winemaking process, there is the use of certain fining agents, such as casein (which is derived from dairy products), gelatin (which is derived from non-kosher animals) and isinglass (which comes from non-kosher fish). Egg whites can be used in the clarification of kosher wine but would not be appropriate for vegan Kosher wine.