These plants contain urushiol, a potent oil that causes allergic reactions in about 85% of people who come into contact with it. Whether you're a hiker, gardener, or just someone who enjoys the ...

Mangoes contain urushiol, the same substance that causes allergic reactions from poison ivy and poison oak. (They're actually in the same plant family!) One 2019 study, showed that prior exposure ...

Poison ivy contains an oil called urushiol, which causes a red, itchy rash when it transfers to the skin. Every part of the plant contains this oil, from the roots to the stem to the leaves ...