● The Product In Jewish law, a food that contains only a minuscule amount of a non-kosher ingredient can still be considered kosher if the non-kosher ingredient is nullified (usually) by at least a factor of 60 to 1. At first glance it would appear that we can apply this rule to our scenario, since the original cells are greatly outnumbers by the “meat” produced. However, halachah states that the above rule does not apply to a “davar hama’amid,” an ingredient that establishes the form of the item. The essential ingredient can never be nullified, no matter how small it is.12 It would seem that the same rule applies to the cells that are essential to growing the meat. If they don’t come from a kosher source, they can never be nullified, and whatever is created with them is also not kosher.
As noted earlier, these are just preliminary thoughts on the subject. Any halachik ruling would have to come from rabbis who are expert in these matters.