Meet the players that keep your metabolism humming.

What is metabolism?
Ghrelin and Leptin

Metabolism is a collective word to describe the biochemical processes in your body that work together to convert your food into energy. 7 days a week, 24 hours a day, there is a quirky bunch of characters working together to maintain your metabolic harmony.

Pancreas and Beta Cells

Your Pancreas is an organ that makes enzymes to breakdown the macronutrients in your food.


When Glucose from digested food moves into your bloodstream, your Pancreas triggers the release of a hormone called Insulin.


The Beta Cells live inside the Pancreas. Their job is to make the Insulin.


Your Brain Cells use neurotransmitters to communicate with each other and get you organised to find some food.

Ghrelin is your ‘hunger hormone’. It senses when the level of Glucose in your blood is low and sends a message to your Brain to bring in some food.


When you feel hunger pangs in your stomach, that is Ghrelin tooting for attention.

Glucose and Fructose

Glucose is present in Carbohydrate foods such as fruits, vegetables, 
bread, pasta and sugar.

You are the Conductor of your own Metabolic Symphony.


The Conductor’s job is to appreciate and support each of the players involved in this lifelong performance.


Download the ‘Metabolic Symphony Roadshow’ activity to help a child understand and deliver a live show that teaches others about how their metabolism works.


Download the printable A4 flyer for this module.


While you are eating, they transmit messages to the organs and chemicals involved in your metabolism. Your gut brain sends signals to and from your stomach and intestines during digestion.


Energy from the macronutrients in your food is released into the bloodstream for delivery around your body.

It travels in your bloodstream delivering energy to your brain and body cells.

Fructose is also found in Carbohydrate foods. Its main job is to give energy dense foods, such as fruit and honey, their attractive  sweetness to encourage you to seek them out for an occasional energy boost.

Leptin lets you know when you have taken in enough energy. Leptin’s signal is very subtle but, if you eat slowly and consciously, you can recognise when you are no longer hungry and stop eating.

Insulin and Muscle Cell

Insulin is required to unlock your muscle and body cells so Glucose can be converted into energy.