Cashews have long been associated with the immune system.
And yet, according to new research, the nuts are becoming more allergic than most people realize.
The researchers found that people who eat cashew foods with added cashew protein were more likely to develop symptoms than those who didn’t.
But the researchers also found that the cashews themselves were the real culprit.
In one study, they found that more than 80 percent of people with symptoms of cashew allergy developed them during their diets of cashews, walnuts, and pecans.
The symptoms they saw most often involved “severe and persistent” gastrointestinal distress, diarrhea, and fatigue.
In a second study, people who ate cashew milk had similar symptoms as those who ate dairy, but they reported a higher incidence of GI distress.
(That study was published in 2016 in the Journal of the American Medical Association.)
Other researchers have also found similar effects in other foods, including nuts and beans, which are often considered the most healthful nut foods.
But in a new study, a team of researchers looked at how cashew allergies could develop in people with other dietary sensitivities to nuts, including people who are allergic to other nuts.
They found that exposure to cashews with cashew oil could cause the nuts to become more susceptible to allergies, which can worsen their symptoms.
“We wanted to know if there were any other food groups where we could see similar effects,” said the study’s lead author, Dr. Amy Goss Graves of the University of Alabama at Birmingham.
They looked at the reactions of 13 people who had experienced food allergies, including peanut allergies, to casings from the almond, pistachio, and walnut companies.
They also looked at 12 people who experienced food sensitivities that included a history of food allergies and food allergies to other nut products.
Those people were also compared to 13 healthy people who were also eating healthy.
After analyzing the data, they concluded that people with food sensitivities to nuts were much more likely than healthy people to develop allergic symptoms after consuming cashew food.
The people with allergies were more than four times as likely as people who didn’ t have food sensitities to develop severe symptoms, according a study in the American Journal of Clinical Nutrition.
That suggests that people in general who are sensitive to nuts may be more vulnerable to allergic symptoms than the average person.
And while other researchers have looked at whether the allergy to cashems is related to the food they eat, this study suggests it’s actually related to other dietary allergens.
For example, the researchers note that peanut allergies can cause similar symptoms to the symptoms people with peanut sensitivities experience, so it’s not surprising that the same triggers could trigger the reactions.
And, the allergic reactions might occur even if cashew products are actually nut-free.
“There’s some overlap in the symptoms,” Graves said.
“It’s not clear exactly what the underlying mechanism is.”
The study was funded by the National Institutes of Health.