Better Sleep: Evidence-Based Lifestyle and Nutritional Strategies

Poor sleep is one of the most common health complaints and one of the most consequential. Over time, chronic insomnia is linked to low mood, persistent fatigue, reduced self-esteem, relationship difficulties and a significantly increased risk of serious chronic diseases including dementia, cardiovascular disease and cancer. Physical, mental and environmental factors all combine to disrupt a good night's sleep, and no single intervention works for everyone. This article covers the full range of evidence-based strategies from lifestyle changes and dietary choices to over-the-counter options and targeted supplementation to help you understand what actually works and why.

Identify and address underlying medical causes first

Before addressing sleep habits, it is worth considering whether a medical condition may be disrupting sleep. Common causes include depression characterised by early morning wakening with dark thoughts joint pain, hot flushes or night sweats, breathlessness when lying flat, the need to pass water frequently during the night, abdominal bloating or wind, and side effects from medications including steroids or stimulants. Many of these can be addressed through lifestyle measures alone; others may require support from a GP or specialist.

Blue light in the morning, red in the evening

Light is one of the most powerful regulators of the body's internal clock. Blue light triggers photoreceptors in the eyes and signals alertness which is helpful in the morning but damaging at night. During the day, aim for at least 15 minutes of natural light exposure on a sunny day or 30 to 60 minutes on a cloudy one.

In the evening, switch to warmer red and yellow light wavelengths and reduce overall light levels as much as possible. Avoid screen use in the final hours before bed, or install a blue light filter application on devices and set brightness to its lowest setting. Wearing amber-tinted glasses for the last two to three hours of the day has been shown in multiple studies to improve sleep quality and support natural melatonin production. Once in bed, sleep in complete darkness cover LED lights on phones and devices and use blackout curtains where possible.

Reducing and managing stress

Cortisol the body's primary stress hormone is also a key circadian rhythm regulator. Chronic stress elevates cortisol at the wrong times of day, directly disrupting the sleep-wake cycle. Practical strategies to reduce evening cortisol include structured relaxation techniques, regular physical exercise, meditation, yoga, and simply creating space for calming activities such as a warm bath before bed. Cognitive behavioural therapy for insomnia (CBT-I), delivered by a clinical psychologist or trained GP, is one of the most evidence-based non-pharmaceutical interventions available and includes stimulus control therapy, sleep restriction therapy, relaxation training and biofeedback approaches.

Regular bedtimes and sufficient sleep duration

The body begins producing melatonin approximately two hours before your habitual bedtime. Overriding this signal with stimulating content, sugary snacks or screen use disrupts the circadian rhythm and reduces sleep quality even if total sleep time is preserved. Most adults require between seven and nine hours of sleep per night. Aim to go to bed only when sleepy, wake at a consistent time each morning, and avoid daytime naps unless essential. If sleep does not come within 20 to 30 minutes, get up and engage in a quiet, low-light activity until drowsy.

Physical activity

Regular exercise is one of the most consistently supported interventions for improving sleep quality. Even ten minutes of aerobic activity such as walking or cycling can meaningfully improve nighttime sleep. Exercise reduces anxiety and depression two major contributors to insomnia and supports the regulation of circadian rhythms. Avoid vigorous exercise within two hours of bedtime as this can be stimulating for some people, though the individual response varies.

Diet and blood sugar management

Heavy, fatty, spicy or fried foods consumed close to bedtime can trigger indigestion and heartburn that directly disrupts sleep. Processed sugar in the evening is particularly disruptive it causes rapid spikes and subsequent drops in blood sugar that activate stress hormones during the night. Focus instead on complex carbohydrates and healthy fats in the evening, and avoid large quantities of liquids before bed to reduce the need to urinate during the night. Caffeine should ideally be avoided after 2 pm or cut entirely if sleep difficulties persist.

Gut health and the gut-brain axis

Poor gut health is a frequently overlooked driver of sleep disruption. Bloating, wind, indigestion and irregular bowel habits are not only uncomfortable at night they also generate systemic inflammation that can directly interfere with sleep hormones. The connection between gut microbiome health and brain function is well established, with evidence showing that a healthy gut microbiome supports the production of serotonin a direct precursor to melatonin.

Practical dietary strategies to support gut health include avoiding snacking between meals and late at night, maintaining a 13-hour overnight fast, reducing ultra-processed foods, sugar and alcohol particularly beer and spirits and increasing intake of prebiotic-rich foods such as beans, artichokes, mushrooms, fruit, vegetables and nuts. Fermented foods including kefir, miso, tempeh, kimchi and sauerkraut eaten daily can meaningfully support microbiome diversity.

For additional probiotic support, YourGutPlus+ combines five Lactobacillus strains with prebiotic inulin from chicory and vitamin D3. It has been evaluated in three large clinical studies and found to support gut microbiome health, reduce systemic inflammation and improve overall wellbeing all of which have downstream benefits for sleep quality.

Melatonin-rich foods and phytomelatonins

Melatonin is synthesised in the body from serotonin, which is itself made from the amino acid tryptophan. Seafood is one of the richest dietary sources of tryptophan and also contains long-chain omega-3 fatty acids shown to improve brain health and support circadian rhythm regulation. Citrus bioflavonoids found in pomegranate, Montmorency cherries and oranges are rich in phytomelatonins plant precursors to melatonin that support the body's own production of this critical sleep hormone.

Ginger and turmeric also contain phytomelatonin. A simple and effective evening drink is freshly grated ginger with hot water, a squeeze of lemon and a pinch of turmeric a natural and warming approach to supporting melatonin production before bed.

Sleep hygiene checklist

The following practical habits form the foundation of good sleep hygiene:

• Reduce caffeine after 2 pm and avoid it entirely if sleep problems persist
• Avoid sweet foods and alcohol in the evening
• Avoid large amounts of liquid before bed
• Avoid daytime naps unless essential
• Establish a consistent bedtime and wake time seven days a week
• Go to bed only when sleepy if sleep does not come within 20 to 30 minutes, get up
• Avoid stimulating television, books or screen use late at night
• Keep the bedroom cool, dark and quiet
• Use blackout curtains and cover LED lights on devices
• Exercise regularly, but not within two hours of bedtime
• Engage in a quiet, relaxing activity before bed

PhytoNightPlus+ a non-sedating botanical approach

PhytoNightPlus+ is an entirely natural nutritional supplement that harnesses the calming, mood-enhancing and sleep-supportive properties of concentrated, purified phytochemical-rich whole plant foods. Unlike conventional over-the-counter sleep aids which work primarily through sedation PhytoNightPlus+ prepares the body for restful sleep by targeting six biological mechanisms that commonly interfere with sleep quality.

It was developed by a scientific team from Cambridge University Hospitals and is one of the few sleep supplements evaluated in a double-blind randomised controlled trial. Results from a large long Covid nutritional study found that PhytoNightPlus+ significantly reduced daytime fatigue and improved nighttime sleep quality in both men and women including improvements in deep and REM sleep measured by wearable devices.

Because it is non-sedating, PhytoNightPlus+ can also be taken in the middle of the night by those who wake after initially falling asleep, without causing morning grogginess or next-day impairment.

Key ingredients and their mechanisms include:

Chamomile (high-dose concentrated extract) has been shown in controlled studies to reduce anxiety and improve sleep quality. A standard cup of chamomile tea does not contain sufficient quantities to achieve these effects the concentrated extract in PhytoNightPlus+ provides a meaningful therapeutic dose.

Montmorency cherry is one of the richest natural sources of phytomelatonins plant compounds that support the body's own melatonin production and help regulate the sleep-wake cycle without causing dependency or tolerance.

Citrus bioflavonoids from Citrus sinensis support melatonin regulation and have been shown to help maintain a healthy circadian rhythm, particularly relevant for those experiencing disrupted sleep due to shift work, jet lag or menopause.

Resveratrol works synergistically with chamomile to dampen stress hormones and lift mood in the evening, reducing the negative thought patterns that so commonly prevent the transition into sleep.

Turmeric reduces nighttime inflammation and joint discomfort two common causes of waking during the night and contributes phytomelatonin to support the overall formula.

Minerals and sleep - PhytoMineral

Magnesium deficiency is particularly common in older adults and has been linked to insomnia and poor sleep quality. Some research suggests that correcting magnesium deficiency can reduce insomnia, though the benefit is most meaningful in those who were deficient to begin with. Rather than taking isolated magnesium, a comprehensive mineral supplement covering all essential minerals including magnesium, zinc, selenium, copper, manganese, chromium, iodine and vitamin D3 makes more nutritional and practical sense.

PhytoMineral provides all of these in a single daily capsule, developed by the same research team at the University of Bedfordshire and Cambridge University Hospital that produced YourPhyto and YourGutPlus+. Taking all essential minerals together avoids the risk of isolated over-supplementation of any single mineral and supports the full range of biological processes that underpin good sleep.

Melatonin tablets

Melatonin is licensed in the UK as a prolonged-release prescription product. It can help shorten the time taken to fall asleep, reduce nighttime awakenings and improve overall sleep quality. It is particularly useful for jet lag. Recommended doses are typically between one and three milligrams taken shortly before the intended sleep time. Melatonin should not be taken during the day. Uncommon side effects include morning grogginess, disorientation and sleepwalking. It is not recommended for use during pregnancy or breastfeeding.

Other over-the-counter options

Antihistamines widely found in over-the-counter sleep aids induce drowsiness through sedation rather than addressing the underlying cause of poor sleep. Tolerance develops rapidly, often within just a few days. Side effects include daytime drowsiness, dry mouth and dizziness. Older adults should use these with particular caution, as anticholinergic drugs which include sedating antihistamines are associated with an increased risk of dementia with prolonged use.

Valerian has been used for sleep support for centuries but the clinical evidence for its effectiveness is inconsistent. Most people who benefit from it report that the effect builds over several weeks of consistent use. It is generally safe for adults, with rare mild side effects including headache and stomach upset.

CBD oil has shown sleep improvements in some studies. It is typically taken as several drops under the tongue, held for 30 to 60 seconds before swallowing. Evidence remains preliminary but it is generally well tolerated.

GABA and glycine are amino acid neurotransmitters available in supplement form. Small trials suggest they may reduce stress and support sleep onset, with glycine in particular showing benefit for reducing the performance impact of insufficient sleep. Both are generally considered safe, though the evidence base remains limited compared to more established interventions.

A practical supplement protocol for sleep

For those looking to address sleep difficulties with evidence-based nutritional support alongside lifestyle measures, the following combination represents the approach most thoroughly evaluated in clinical research:

• PhytoNightPlus+ 1 to 2 capsules before bed. Non-sedating botanical sleep support targeting 6 biological mechanisms. Can also be taken if waking during the night.
• YourGutPlus+ 2 capsules per day (morning and evening). Multi-strain probiotic with prebiotic inulin and vitamin D3. Supports the gut-brain axis, reduces systemic inflammation and improves overall wellbeing.
• PhytoMineral 1 capsule per day with a meal. Comprehensive multi-mineral formula including magnesium, zinc, selenium, iodine and vitamin D3. Supports the full range of biological processes underpinning sleep regulation.

These supplements are designed to complement, not replace the lifestyle strategies described above. Where health conditions or medications are involved, always consult your doctor or pharmacist before starting any new supplement.

Citation

Scientific Editor. "Tips for a Better Night's Sleep." Keep Healthy, updated 28 June 2026. Available at: https://keep-healthy.com/sleep/