Why humans die on eating a liver of polar bear?
Answers
Polar bears are cute, especially if they’re still cubs. Knut, a polar bear born in captivity in a zoo in Berlin, was a media sensation. However, they are quite dangerous. Polar bears are big (adults can weigh up to 700 kg), fast (can sprint up to 40 km/h), aggressive, very protective of their young and can kill you with one lazy swipe of their furry paw. Polar explorers are very aware of the dangers of polar bear and bringing a rifle on an expedition is mandatory
Vitamins are nutrients that are vital for the correct functioning of our body but which we are not able to synthesise ourselves in sufficient quantities. Without them, we’d die. And since we can’t produce them ourselves, we have to get them from somewhere: from the food we eat. But a substance can be a vitamin to one species and not to another. For example, humans can’t produce their own ascorbic acid (vitamin C) (neither can guinea pigs and apes), but most other animals can. Thus, ascorbic acid is a vitamin for humans, but not for, say, polar bears.