The Truth About Stress, Prebiotics & Sleep

Inulin for sleep

I doubt that I’m the only one here who spends hours on end staring at the ceiling trying to sleep. Like many insomniacs, I’ve tried everything. I’ve run out of sheep to count and my cupboards are now void of any herbal tea. But something that I never thought to consider is my gut. And yet, apparently, our gut can affect the duration and quality of our sleep… New research has suggested that prebiotics can help us to sleep better by altering the bacteria in our gut. Here’s the science behind it.


BBC The Truth About Sleep

A few months ago, the BBC aired a documentary on prebiotics and sleep. In it, insomniac Dr Michael Mosley found that the best way to fall asleep was to take a prebiotic fibre before he went to bed. For five days, he took a prebiotic fibre supplement about 20 minutes before he slept. He noticed that it increased the time that he was asleep and decreased the time in bed that he spent awake.

graphy to show the effects of prebiotics and sleepResults from the BBC study by Professor Philip Burnet from the University of Oxford.

Not only did he find that the prebiotic supplement increased sleep and decreased awake time, but they also appeared to improve the quality of his sleep. The time he spent in the REM stage of sleep increased significantly. This is the stage when restoration and recovery happen, meaning that he woke feeling more refreshed.

Now, insomniacs like me are probably thinking: WOW. But before I get too excited, let’s see what science has to say about Dr Michael Mosley’s findings on prebiotics and sleep.



The Science of Prebiotics and Sleep

Prebiotics increase good bacteria in the gut. They are a type of carbohydrate that doesn’t get digested and so they can reach the gut to feed the good bacteria there. This helps us to absorb more nutrients from the foods we digest, which are essential for our body to function. But how can this increase in good gut bacteria impact our sleep?

When the prebiotic reaches our gut, the good bacteria break it down into something called short-chain fatty acids. These are what are improving your sleep. They help to regulate blood sugar and energy sources, which often fluctuate at night. These fluctuations can result in disturbed sleep and so by stabilizing blood sugar and energy, the prebiotics can improve the quality of our sleep.

But the benefits of prebiotics doesn’t stop there…


Prebiotics And Stress

Stress and sleep are interlinked. Stress can cause difficulty sleeping and a difficulty sleeping can cause us to be more susceptible to stress. Recent studies have found that prebiotics can help us to deal with stress and aid deep sleep during stressful times.

One study by the University of Oxford saw that taking prebiotics affected our tolerance of the stress hormone, cortisol. Another study by scientists at the University of Colorado found that “prebiotics can also have an impact on buffering the physiological impacts of stress.” The researchers say that “it is possible that a diet rich in prebiotics started in early life could help improve sleep, support the gut microbiota and promote optimal brain/psychological health.” According to the research team, that’s because “Mycobacterium vaccae blocked those sensitizing effects of stress […] creating a lasting stress-resilient phenotype in the brain.”

Previous studies have found the link between our moods and our gut. Medical News Today reported one study that suggested “stomach acid drugs may induce depression by disrupting the gut-brain axis”, and another that found a “link between gut health and post-traumatic stress disorder”. But scientists have now found that our gut can affect our levels of stress too. 


Myvitamins Inulin Powder

In the BBC documentary, The Truth About Sleep, Dr Michael Mosley used a powder like Inulin as his daily prebiotic fibre supplement. Inulin can be found in sweet potatoes, garlic, onions, which can be easily integrated into your diet. However, as a supplement, Inulin is more concentrated and consumption can be controlled. The myvitamins inulin fibre powder is the perfect way to increase your consumption. With a sweet taste, our inulin can be added to smoothies, used in baking, or mixed into a bedtime drink to help soothe you into a deeper sleep.



How Does Lack Of Sleep Affect You?

If you struggle to sleep, you may be more than aware of the effect it has. But a lack of sleep can affect our bodies in ways than you may not even realise.

  • Difficulty concentrating
  • Low moods
  • Risk of obesity and high blood pressure
  • Lowered immune system
  • Shortened life expectancy
  • Difficulty with fertility
  • Change in appearance
Why Beauty Sleep Is So Important

Health & Fitness

Why Beauty Sleep Is So Important

2019-04-25 08:43:30By Katie Lambert

University of Colorado at Boulder, 2017. Dietary Prebiotics Improve Sleep & Buffer Impacts Of Stress.  [Online] <>

University of Oxford, 2015. Prebiotic intake reduces the waking cortisol response and alters emotional bias in healthy volunteers. [Online] <>

MedicalNewsToday, 2018. Probiotics Might Make Us Immune To Stress. [Online] <>

Katie Lambert

Katie Lambert

Writer and expert

After studying History at The University of Leeds, Katie moved back to her home town of Manchester to start a career in content writing. Katie has a passion for health and fitness and enjoys running in her spare time. Her favourite topics to write about include healthy recipes, performance strategies and general wellbeing.