Finding traces of peanut in ground cumin spice has led many retailers to pull hundreds of products from store shelves. People with peanut allergies are advised by medical experts to not eat any product that has peanuts as an ingredient in it as it may cause a life-threatening danger.

The Food and Drug Administration has warned all people with peanut allergies to stay away from cumin and products that contain cumin. The recall for cumin and cumin containing products has been ongoing since December.

"You might do all of the things you are supposed to do and read the label, but there could still be undeclared allergens. It's challenging to know that and still feel comfortable", said Dr. Michael Pistiner, a Boston-based pediatric allergist.

The group Food Allergy Research and Education, or FARE, has revealed that 15 million people are living with food allergies, including one in 13 children. Peanuts, tree nuts, milk, eggs, wheat, soy, fish and shellfish are eight food items that account for more than 90% of the allergies.

A legislature was enacted in 2006 to list these ingredients on food packages, but the loophole in the law is less clarity about cross contamination. This has enabled companies to get away when they don't list on the label if peanuts or other allergens are processed in the same facility or on the same equipment.

There is no clear figure about how many people may have reactions to allergens that manage to make their way into food. The FDA came across 428 reports of adverse events related to undeclared allergens between January 2012 and December 2014. These reports are made by consumers and the FDA couldn't confirm them every time.