Intrinsic Factor (IF) is a protein made in the stomach that is essential for ensuring the natural absorption of vitamin B12.
Recombinant Protein Technology
The gene for a human protein is inserted into the genetic code of other cells that can produce a protein that is identical to what is made in the body.
Is Human Intrinsic Factor from humans?
No! But it is human-derived because it is produced from the gene that makes human Intrinsic Factor.