Urushiol: What Poison Ivy and Mangos Have In Common

Urushiol: What Poison Ivy and Mangos Have In Common

Whether its on ourselves or on camping companions, most of us are familiar with the red, itchy rash caused by touching poison ivy. The culprit behind that rash is a chemical called urushiol, which lurks not only on the plant's leaves, but also in its stems, roots, flowers, and berries. What you may not know is that this same chemical is also contained in the skin of the mango fruit, plus the bark and leaves of the mango tree. If you get a reaction from poison ivy or its cousins, poison oak and poison sumac, you may find yourself with an itchy, blistering, swollen lip after eating mango straight off the peel. Luckily, the fruit itself doesn't contain urushiol, so if you slice the fruit from the skin beforehand you'll most likely steer clear of any reactions. Interestingly, cashew shells also contain urushiol, but because they're sold shelled and processed at high enough temperatures to destroy the chemical, they're unlikely to cause problems.

The Chemistry of Poison Ivy

Explore the insidious world of urushiol.


Why Do We Get Allergies?

Find out what makes our bodies react so strangely.


Dealing With Food Allergies

Food allergies can completely take over some people's lives.

See all



Pioneering Women

Space Telescope

Get smarter every day! Like us on Facebook.
You'll get the most interesting and engaging topics in your feed, straight from our team of experts.