This reminds me of an interesting article I read about unintended consequences from rules like this.

Advocates for families coping with allergies lobbied for years to have sesame added to the list of major allergens.

Under the new law, enforced by the Food and Drug Administration, companies must now explicitly label sesame as an ingredient or separately note that a product contains sesame.

If the ingredients don’t include sesame, companies must take steps to prevent the foods from coming in contact with any sesame, known as cross-contamination.

Officials at Olive Garden said that starting this week, the chain is adding “a minimal amount of sesame flour” to the company’s famous breadsticks “due to the potential for cross-contamination at the bakery.”

Chick-fil-A has changed its white bun and multigrain brioche buns to include sesame, while Wendy’s said the company has added sesame to its French toast sticks and buns.

United States Bakery, which operates Franz Family Bakeries in California and the Northwest, notified customers in March that they would add a small amount of sesame flour to all hamburger and hot dog buns and rolls “to mitigate the risk of any adverse reactions to sesame products.”