Common causes include foods such as peanuts, tree nuts, sesame, fish, shellfish, dairy products and eggs.

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Some molds produce mycotoxins, unavoidable contaminants found in foods such as peanuts, corn and wine.

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Dr Nasser explains that the broken skin can allow allergens such as peanuts to enter the unprotected body, prompting the immune system to react as if the peanut was an enemy invader.

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"These increases could be caused by increasing exposure to environmental risk factors such as peanuts and other foods or latex, to an increased susceptibility in the population to these allergens or a combination of these factors, " they wrote.

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The diet eliminates all grains, including whole grains, which are a good source of vitamins, minerals, antioxidants and heart healthy fiber, and foods such as beans, peanuts and sweet potatoes, all of which have numerous health-promoting qualities.

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Even a seemingly simple business-networking event, such as a baseball game where peanuts are thrown around the stadium, can be a challenge for an employee with food allergies.

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But he said it was "peanuts" to a giant such as Google.

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The Lees took to the streets -- and then a printed catalog and eventually set up a website, boiledpeanuts.com -- selling the peanuts and other regional staples such as sorghum molasses, pickled artichokes and watermelon rind and stone-ground grits to displaced Southerners all over the country.

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Ethereal dishes such as a lemon rice flecked with poppy seeds and peanuts seem deceptively simple but burst with flavor.

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