Zel's Vegan NutGourmet

Zel Allen Goes Nuts for Good Health

Posts Tagged ‘mango allergy’

SCIENCE EXPLAINS THE CASHEW AND MANGO DILEMMA

Posted by Zel Allen's nutgourmet on January 22, 2012

Within a few hours after I posted my family’s experience with allergic rashes from consuming mangoes and cashews, I received the comment below. It’s so well explained in scientific terms I thought it important to share in a post rather than a comment.

The information comes from Sandra J. Baker, author of The Poison Oak & Poison Ivy Survival Guide.

Thank you so much Sandra. Your information explains the science behind my husband’s and two sons’ itchy rashes after eating mangoes and cashews. Hopefully, this post and the previous one will benefit others who suffer the misery of itchy skin rashes and haven’t discovered the cause.

Sandra writes:
I can add to your quest for information. Mango, cashew and poison oak, ivy and sumac are all in the family Anacardiaceae. Then poison oak, ivy and sumac join the genus Toxicodendron which contains the allergenic oil urushiol in its resin. But, mango and cashew also have allergenic oils. Mango has resorcinol, and cashew has anacardiol and cardol. All of these allergenic oils have enough similarity that if you are allergic to one, you are probably allergic to the others.

Mangos’ allergenic oil is mostly in the resin canals in the skin (always peel first before eating), and is thought to be somewhat weaker than poison oak/ivys’ oil. Some people are extremely allergic to it, but a mango grower said his workers usually don’t get much of a rash at the beginning of working with the plants. After a while, the sensitivity usually goes away. The oil can migrate from the skin into the flesh, so it is a good idea to stay away from all mango products, even juice if you know you are allergic.

All cashews imported into the US (even those labeled raw) are shelled and cooked a bit beforehand, because that will destroy the allergenic potential of the cashew nut shell oil that is between the honeycombed layers of the shell. (the oil of the cashew itself is harmless). (Poison oak/ivy and sumac oil is highly resistant to heat by the way.

Very seldom, cashews are accidentally imported without being cooked, and may have been contaminated from the shell cracking procedure, Rashes have been documented. This is a much smaller problem than that of mango rashes.

Posted in cashews, Nut Allergies, nut research, Nuts and Health, Uncategorized | Tagged: , , , , , , , , , , | 39 Comments »

BEWARE THE CASHEW ALLERGY —-AND THE SECRET MANGO CULPRIT!

Posted by Zel Allen's nutgourmet on January 21, 2012

My husband has had a love affair with raw cashews for years and never had an allergic reaction to them. He’s also enjoyed mangoes and eats them with gusto whenever they’re in season. He’s nibbled on a couple of handfuls of cashews almost daily for years—that is, until now. Here’s an account of the surprising tale of the cashew allergy and the sneaky mango offender.

We traveled from our home in Los Angeles to the Philippines to visit our son who has been living and working there. Every day we feasted on the delicious and bountiful tropical fruits like longan, lanzones, jackfruit, pineapples, and the sweetest mangoes, ever.

Almost daily, we were enjoying those succulent mangoes with gusto and had them mainly for breakfast and occasionally for lunch. They were difficult to resist with their ultra silky smooth flesh and practically hairless texture. It was easy to cut into them and munch the flesh right off the mango seed.

One afternoon, my husband concluded his lunch with one of those irresistible mangoes, then, put on his socks and shoes for a fun outing that followed. Within an hour or two, he was scratching at his ankles that began to itch annoyingly. When he rolled his socks down to examine the cause of the itching, he saw a bright, red rashy area that practically encircled his ankles.

An internet search for mango allergy turned up a surprising bit of allergy information. Mangoes can, indeed, cause an itchy rash in sensitive people who handle the peel and eat the area directly under the skin. My husband remembered peeling the mango for lunch and made the connection that the mango residue on his hands came in direct contact with his ankles as he put on his socks. Fortunately, he was able to connect the mango to his itchy rash.

For several months our son had been suffering from an itchy rash that covered the upper portion of his body and his arms, but he could never find the cause. As the rash and itching worsened, he began taking medication to gain relief, but found little success. In an effort to trace the source of the problem, he began experimenting with different laundry detergents, lotions, and body-care items. He also began eliminating common foods known to be allergens, but nothing helped, until my husband’s dramatic mango reaction.

While we were together, our son also experienced a swelling and numb sensation in his lips and the area around his mouth. That symptom lasted for several days before subsiding. That, too, was mentioned in the research on mango allergy. The research was an aha moment for both my husband and our son who both swore off mangoes.

The rash on my husband’s ankles lasted for three weeks before subsiding. About a week after we returned from our Philippine visit, my husband resumed his handful of cashews and within an hour he began scratching his back. Sure enough, his back was broken out in a bright red rash that looked like slightly raised, individual red pimples–tons of them.

Then came another aha moment. That mango research mentioned the cashew family that includes cashews, pistachios, poison oak, poison ivy, and poison sumac. Now, both mangoes and cashews are off the menu for my husband and our son.

When we mentioned our mango experience to our other son, he told us he also experienced the numbness around his mouth and lips when eating mango. It appears there’s a heredity factor, so beware the cashew allergy and the hidden mango culprit.

Hopefully, my family’s rashy account may help solve a rashy mystery for others.

Posted in cashews, Nut Allergies, Nut Oddities, Nuts and Health, pistachios | Tagged: , , , , , , , , , | 129 Comments »

 
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