Glucagon

This hormone is made in the pancreas in its alpha cells.

It’s effects are opposite to those of insulin.

It is released in response to lower blood glucose levels and it stimulates the liver to breakdown its glycogen stores (stored glucose). It activates ‘gluconeogenesis’- new glucose production by the liver and breaks down stored fat (triglycerides in your fat cells).  

All this results in increasing blood glucose levels.

So, we are capable of increasing our blood glucose levels without ingesting any carbohydrate without any food.