All these products are familiar to almost every inhabitant of our planet, but few people know that they can be toxic, according bigpicture.ru.

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Raw cashew nuts

The raw cashew nuts contain allergic toxin urushiol, which is also found in poison ivy.
This toxin causes very painful skin rash. Sold in supermarkets "raw cashews" in fact treated with hot steam. But, buying, you need to choose solid ones: the dried and shriveled are not good for human consumption.