Islam and Judaism have many similarities in their dietary laws, and one of them is that only animals with split hooves can be eaten. This includes sheep, goats, and cows but does not include pigs. Because of this, almost all kosher gelatin is pork-free. However, there is an exception to this rule. Some strains of Judaism don't categorize gelatin as a food. Because of this, non-kosher gelatin may be eaten, as the body doesn't derive nutrients from it.