US FDA Bans Red Dye No. 4 Over Dog Bladder Tumors, September 22, 1976

Red Dye No. 4 is banned by the US Food and Drug Administration after it is discovered that it causes tumors in the bladders of dogs.

Red Dye No. 4 is banned by the US Food and Drug Administration after it is discovered that it causes tumors in the bladders of dogs.

Date: September 22, 1976

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