There is absolutely no parallel between the natural occurrence of leukocytes in milk and use of leukocytes derived directly from blood.
God’s law did not apply to white blood cells in milk or blood in meat, but we cannot say the same for WBC which have simply been separated from blood. They have not become something else which was approved for consumption but are still functioning exactly as within blood. Jehovah’s Witnesses take great pains to obey God’s prohibitions and avoid any part of blood which can still be viewed as blood. The leukocytes found in mothers milk can in no way be considered blood. However, if a servant of Jehovah God was to consider the leukocytes in the mothers milk as blood, then it WOULD be wrong for them to let their baby partake.
But the whole intent of those who denounce the use of fractions is to excuse their disobeying Jehovah God's clear prohibition of blood. How hypocritical for someone to criticize Witnesses’ allowing others the freedom freely make their own choice regarding fractions while they are deliberately disobeying God’s command to “abstain from blood.” Jehovah's TRUE CHRISTIAN WITNESSES love freedom! We give freedom to all!!!
So again, we do not even have to prove that WBC undergo physical changes when they are part of milk because whether they change or not is irrelevant. They have become part of something that God has approved (mothers milk)which cannot be said of WBCs which are derived directly from blood. There are several passages in scripture which talk about a baby being nursed by its mother, so the prohibition of blood cannot apply to a mothers milk.