Food : Why these foods are poisonous ?

 

Pufferfish has killed an old couple in Malaysia.

Can we eat pufferfish ? 

Yes, you must know how to take away the poisons. 

There are few foods are poisonous but you can eat it.  

Death of couple after eating pufferfish: Buah keluak, oysters and other foods to be cautious of 

https://www.straitstimes.com/singapore/pufferfish-buah-keluak-kidneys-of-the-sea-here-are-some-food-items-to-be-cautious-with