Since the condition isn’t recognised by conventional medicine, it can be difficult to get a diagnosis, and both Lashbrook and Devonish went down the complementary route.

Boellinger maintains that there are many ways to successfully treat and manage the symptoms of adrenal fatigue, while Lashbrook is evangelical about the difference overhauling her lifestyle has made. She tells Stylist: “I now sleep better, am more alert when I wake up and I can exercise again – something that was out of the question before.” Below are Boellinger’s top tips.

Manage cortisol levels

“The first and most important step in recovery is stress management. Ideally, we would want to eliminate the root cause of chronic stress, which of course is not always possible. So, we’d look at building stress resilience and techniques to help us deal with stress such as breathing exercises, meditation or spending time in nature. All of these will help to actively lower cortisol, helping to return them to more normal levels.”

Consider supplements

You might want to think about upping your magnesium and potassium intake (ideally via your diet but using supplements if that’s not possible). “Magnesium helps us relax and wind down – it has a calming effect on our nervous system,” says Boellinger. “Not having enough magnesium has been linked to low energy, and studies (link) have also found that those who are chronically stressed are more likely to be lacking magnesium.”

Feeling exhausted and anxious? You might think you have adrenal fatigue – but not everyone’s convinced