What is the primary danger of drinking the internal fluid of a barrel cactus to survive a desert emergency?
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While popular culture suggests you can easily drink from a cactus, the fluid inside is actually a bitter, alkaline soup packed with toxic alkaloids. Drinking it can cause severe diarrhea and vomiting, which quickly speeds up dehydration. Photo: Karelj, Wikimedia Commons, Public domain.
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Source: Wikipedia (CC BY-SA)
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