"We roast peanuts, and potentially, roasting it makes a more allergenic food out of it," he says.

What are some of the most common allergenic foods?

Except for highly allergenic foods, the digestive system can pretty much handle what comes its way by 4 to 6 months.

Cross con-tact occurs when a residue or other trace amount of an allergenic food is unintentionally incorporated into another food.

While more than 160 foods can cause allergic reactions in people with food allergies, the law identifies the eight most common allergenic foods.

Results of follow-up testing can guide decision-making regarding whether and when it is safe to introduce or re-introduce allergenic food into the diet.

If you're raising a child or even just like giving dinner parties, you should be familiar with some of the most prominent allergenic foods.

The discovery makes shrimp one of a few allergenic foods for which the actual allergen has been purified and identified.

Those foods could include commonly allergenic foods such as peanuts, tree nuts, eggs, and milk, for example.

There are more than 160 allergenic foods, but these eight foods and food groups are the culprits 90% of the time.