What happens when you have too little body fat

And why is too little body fat bad for us?

Dietary fat is the fat you eat in your food, while body fat is nature's way of storing energy you don't need.

We can think of our body fat as a specialised storage vault, taking up nutrients when energy is abundant and releasing them only when needed, says Mikael Ryden, professor of clinical and experimental fat tissue research at the Karolinska Institute in Sweden.