Thinking about munching on some mixed nuts while watching a football game? Those nice salty cashews are only good if they are cooked.
One of the most common nut varieties, cashews (which are actually a seed) contains a compound called urushiol. Perhaps you are familiar with poison ivy? Urushiol is the same compound found in the leaves of the poison ivy plant.
Well raw cashews also contain urushiol, and ingesting or touching them can cause a similar reaction. Most cashews that are sold are steamed, roasted or cooked in some manner, making them safe to eat. It is only the raw variety that can cause problems.