The Connection Between the Food We Eat, Our Microbiome and Our Sleep

Sleep is essential for our overall health, yet many people struggle to get enough good sleep. Interestingly, one of the key factors influencing the quality of our sleep is something we often overlook and that is the food we eat. Recent research has shed light on the powerful connection between food, sleep, and the gut microbiome – the community of thirty-nine trillion microorganisms (yes you read that right) which live in our colon.

What we eat directly impacts our gut microbiome, and a healthy, balanced microbiome can significantly improve our sleep patterns. The gut microbiome plays a very importantl role in regulating sleep by producing neurotransmitters like serotonin, which is a precursor to melatonin. Melatonin is the hormone responsible for regulating our sleep-wake cycle. Around 90% of serotonin is produced in the gut, making the connection between gut health and sleep even more significant.

A diet rich in fiber, fruits, vegetables, and fermented foods can promote a diverse and healthy microbiome. These foods are rich in prebiotics, which serve as food for beneficial gut bacteria. When this good bacteria in our gut thrive, they produce short-chain fatty acids (SCFAs) like butyrate, which not only support immune function but also help in reducing inflammation, a factor that can disrupt sleep.

Here are some foods which can actually promote sleep:

• Nuts and seeds such as almonds and sunflower seeds are high in magnesium which can help relax the muscles and promote restful sleep
• Leafy greens such as kale, spinach and collard greens are also high in magnesium
• Cherries are a natural source of melatonin, a hormone that regulates our sleep cycles
• Bananas are rich in potassium and magnesium, which help relax muscles and promote better sleep.
• Oats contain melatonin and are a good source of complex carbohydrates, which can boost serotonin levels
• Lettuce contains a compound called lactucarium, which has mild sedative effects.
• Kiwis are high in antioxidants and serotonin, which help improve sleep onset and quality.
• Pumpkin seeds are rich in magnesium and also tryptophan, which can help with sleep.

Here are some foods and eating habits to avoid when we wish to promote sleep:

• Food that’s hard to digest particularly fried food which is high in fat and processed food take longer to digest. This can lead to discomfort, indigestion, and bloating, making it harder to get comfortable and fall asleep. A diet high in saturated fats has been linked to lighter sleep and more frequently waking during the night. This is because high-fat foods can alter the balance of sleep stages, particularly reducing the amount of REM sleep, which is crucial for cognitive function and emotional regulation.
• High sugar intake, particularly in the evening, can lead to blood sugar spikes and crashes, triggering the release of stress hormones that disrupt sleep. Additionally, sugary foods and refined carbohydrates such as white bread, white pasta and sugary drinks can cause lighter, less restorative sleep. These foods also cause an increase in insulin production, which may lower blood sugar levels too quickly. This rapid drop can lead to hypoglycemia, potentially waking you up in the middle of the night.
• Alcohol’s effects on sleep are complex and generally not good. Although alcohol may make you feel sleepy at first, it disrupts sleep later in the night by reducing REM sleep, the most restorative stage of sleep. Alcohol also relaxes the muscles of the throat, increasing the likelihood of snoring and sleep apnea, which can cause frequent waking. As the body metabolises alcohol, it can lead to dehydration, night sweats, and the need to urinate more frequently – all of which can disrupt sleep.
• Back to the gut microbiome we also know now that the unhealthy foods described above can lead to an imbalance in gut bacteria, promoting the growth of harmful bacteria and reducing the population of beneficial ones. This imbalance can lead to conditions like leaky gut syndrome, where the gut barrier becomes compromised and inflammation increases – further factors that can disrupt our sleep.
• Eating large meals late at night can overwhelm the digestive system, leading to discomfort, indigestion, and heartburn. It can disrupt the circadian rhythm (our internal body clock). When you consume a heavy meal, your body must work harder to digest the food. This increased digestive activity can keep your body awake and prevent you from falling into a deep sleep. Additionally, a full stomach can increase your core body temperature, which can also interfere with sleep.
• Drinking caffeine in the form of coffee or tea can be another sleep disruptor particularly if there is a lot being drunk during the day or it is being drunk later in the day.

Below are some homeopathic remedies which can help with sleep issues:

• Coffea Cruda (Coffee): here’s a remedy which is an excellent example of a key principle which is used in homeopathy ‘like cures like’. As a remedy coffea (or coffee) is for someone who can’t switch off. Their symptoms may have come on from drinking coffee or alcohol. They can be very restless. They are very affected by noise and touch.
• Avena Sateva (Oat Straw): this remedy is also used as a herb in calming nerves. As a homeopathic remedy it is used for nervous exhaustion. It can be used for insomnia which has been brought on by drugs or alcohol, also insomnia from worry or mental exertion.
• Zincum Met. (Zinc Metal): this remedy suits someone whose sleep problems come on after drinking alcohol. They can be worse around their periods. They can be very forgetful and can be very sensitive to noise. They may have twitching in their feet.

Some other remedies which are worth considering for insomnia are Arsenicum Album , Cocculus, Ignatia, and Nux Vomica.

Blog post by Alice Glendinning

If you’d like to learn more about how homeopathy can help improve your sleep, take a look at our course – Natural Ways to Improve Your Sleep. It’s full of simple, practical tips to help you rest deeply and wake up refreshed.