The FDA banned the use of red dye No. 3 in foods and medicines sold in the U.S. because it has been shown to cause cancer in rats. The action highlights the limits of a federal law known as the Delaney clause.

The U.S. on Wednesday banned the use of a synthetic food dye that gives some candies, cakes and certain oral medications a cherry-red color, following evidence that the dye causes cancer in laboratory rats.

(Reuters) -The U.S. Food and Drug Administration on Wednesday banned the use of Red No. 3, a synthetic food dye that gives some candies, cakes and oral medications a cherry-red color, following evidence that the dye causes cancer in laboratory rats.

While the announcement is good news for the Princess of Wales, cancer experts describe the challenges of a life shadowed by an earlier diagnosis.

A fter announcing in March 2024 that she had been diagnosed with cancer, Kate Middleton, Princess of Wales, has again spoken out about her illness—this time, with good news. “It is a relief now to be in remission and I remain focused on recovery,” Middleton announced on X on Jan. 14.

The problem is that a complete remission does not mean the cancer is gone. Even when a cancer is “cured” — defined as no evidence of cancer for five years — it may not be vanquished.