I think cashews have been scientifically proven to be the most addictive substance on earth. I tried to find the studies that must have been published on this hidden epidemic, but instead I found this:cashews are in the same plant family as poison oak (the sumac family) — that’s why you never see them in shells, handling them would be a bad thing for anyone sensitive to sumacs. You may also have heard of “mango mouth,” a rash that results from contact with mango skin — another member of the sumac family. I’ve not heard of the sumac connection causing anyone problems from consuming cashews or mangos, but I get poison oak very easily and have been the victim of mango mouth myself, so I stay away from cashews for the most part on general principals.
I was bemused to read this. I have a cashew addiction and my mum had a mango addiction…..until the day she ate a whole box of mangos in one sitting. She developed an allergic reaction to mangos that was so strong she would swell up if she just walked into a room containing a mango.
I checked in Wikipedia and indeed the cashew, mango, poison ivy and pistachios are all members of the same plant family and mango and poison ivy share a common chemical irritant.