The invention of microwave oven is amazing because you can prepare your meals ahead of time and just reheat it before you serve it.
But, did you know that not all food are safe to be heated?
Here are 7 food that become poisonous when reheated.
Spinach must never be warmed up, experts warn. This vegetable must be consumed after preparation, as it contains nitrates that are turned to nitrites when they are warmed. In simpler terms, spinach can become dangerous if reheated.