Chronic fatigue syndrome (CFS) is a complicated disorder characterized by extreme fatigue, that may worsen with physical or mental activity, but doesn't improve with rest.

CFS can occur at any age, but it most commonly affects people in their 40s and 50s, and more women than men.

Up to 90 per cent of people with chronic fatigue syndrome (CFS) also have Irritable Bowel Syndrome (IBS). Studies have also found abnormal levels of specific gut bacteria in those with CFS. These links have spurred research into the gut-brain axis in the search of the underlying drivers of CFS.

The gut-brain axis (GBA) describes the bi-directional communication between the central and enteric nervous system. Linking emotional and cognitive centers of the brain and peripheral intestinal functions.

Food intolerances and allergies can trigger symptoms similar to those of chronic fatigue syndrome. These reactions also drive inflammation in the gut which can contribute to gut bacterial imbalance and leaky gut.