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CFR > Title 21 - Food and Drugs > CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES > SUBCHAPTER B—FOOD FOR HUMAN CONSUMPTION (parts 100 to 191) > PART 189—SUBSTANCES PROHIBITED FROM USE IN HUMAN FOOD > SUBPART B—Prohibited Cattle Materials (§189.5 to §189.5)