Trp-P-2 induces tumors of the liver, mammary gland, urinary bladder, clitoral gland and haematopoietic system in F344 rats at a dose of 0.01% in the diet. Chlorophyllin, a water-soluble derivative of chlorophyll (CAS No. 1406-65-1), is a potent antimutagenic agent against heterocyclic amines and other environmental mutagens (for reviews, see, refs. 1, 8). Chlorophyllin inhibits tumorigenesis in...