If you struggle to fall asleep, stay asleep, or wake up feeling truly restored, you’re not alone. Estimates suggest that up to 36% of UK adults experience insomnia symptoms weekly — yet most “sleep aids” only sedate you without improving the actual quality of deep sleep.

Deep Sleep™ by SleepAlpha was created to fix that problem.

What Makes Deep Sleep™ Different?

Most natural sleep supplements contain 3–5 ingredients, often at low doses. Deep Sleep™ contains 13 active ingredients, all backed by scientific research, and dosed in line with effective ranges used in human trials.

The Science Behind Every Ingredient (13 Evidence-Backed Actives)

1. 5-HTP (200 mg) — Serotonin → Melatonin Support

5-Hydroxytryptophan (5-HTP) is the direct precursor to serotonin, which your body then converts into melatonin — the hormone that regulates sleep onset and circadian rhythm.

Research: A clinical trial found that 5-HTP supplementation was associated with reduced sleep latency and increased REM sleep time.
Study: Effects of 5-HTP on sleep parameters

Deep Sleep™ advantage: Many products use only 50–100 mg. Deep Sleep™ delivers 200 mg, aligning with effective ranges used in research.

2. Ashwagandha (400 mg) — Stress & Cortisol Regulation

Ashwagandha is an adaptogenic herb known for its ability to reduce perceived stress and modulate cortisol — two major drivers of poor sleep.

Research: A 2020 double-blind, placebo-controlled trial reported that ashwagandha significantly improved sleep quality and sleep efficiency while reducing stress scores by around 44%.
Study: Ashwagandha root extract on sleep quality and stress

Deep Sleep™ advantage: Uses 400 mg, similar to the doses used in human trials.

3. Magnesium (113 mg) — Relaxation & Deep Sleep

Magnesium plays a key role in GABA signalling — the primary inhibitory neurotransmitter that helps the brain and nervous system relax. Many adults are sub-optimal in magnesium intake, particularly under stress.

Research: A 2012 randomised controlled trial in older adults found that magnesium supplementation improved sleep time, sleep efficiency and reduced insomnia severity.
Study: Effects of magnesium supplementation on primary insomnia

4. L-Tryptophan (100 mg) — Serotonin Precursor

L-Tryptophan is an essential amino acid and the starting material for serotonin and melatonin synthesis. When taken in the evening, it can support normal sleep onset and subjective sleep quality.

Research: Clinical work has shown that tryptophan can reduce sleep latency and improve perceived sleep quality in adults.
Study: Tryptophan and sleep regulation

5. Montmorency Cherry (480 mg) — Natural Melatonin Source

Montmorency (tart) cherries naturally contain melatonin and a range of polyphenols that may influence inflammation and oxidative stress — both relevant to sleep health.

Research: A 2018 trial found that tart cherry juice increased total sleep time by an average of 84 minutes in adults with insomnia.
Study: Tart cherry juice and insomnia

Deep Sleep™ advantage: Provides 480 mg Montmorency cherry per daily serving, in line with effective study ranges.

6. Purple Passion Flower (500 mg) — GABA-Supporting Botanical

Passion flower (Passiflora incarnata) is a traditional herbal extract used to support calm and sleep. It appears to increase GABA activity, helping the nervous system unwind at night.

Research: In one trial, passionflower tea significantly improved sleep quality scores in adults with mild sleep problems.
Study: Passionflower and subjective sleep quality

7. Valerian Root (200 mg) — Classic Deep-Sleep Herb

Valerian root has been used for centuries as a natural sleep aid. It may reduce sleep latency and support slow-wave (deep) sleep.

Research: A meta-analysis concluded that valerian is associated with improved sleep quality and reduced wakefulness, particularly when used consistently over several weeks.
Study: Systematic review of valerian for sleep

8. Chamomile (200 mg) — Gentle Anxiolytic Support

Chamomile contains apigenin, a flavonoid that can bind to benzodiazepine receptors in the brain and support GABAergic activity, contributing to relaxation before bed.

Research: Studies suggest chamomile extract can reduce anxiety and improve subjective sleep quality in adults with insomnia tendencies.
Study: Chamomile extract for generalized anxiety and sleep

9. Lemon Balm (300 mg) — Calm, Mood & Sleep

Lemon balm (Melissa officinalis) is a calming herb often combined with other botanicals for sleep. It appears to reduce anxiety and promote a sense of relaxed alertness.

Research: Trials have found lemon balm to reduce anxiety scores and improve calmness and alertness during the day, supporting better sleep at night.
Study: Lemon balm and mood/cognitive performance

10. Hops Flower (200 mg) — Circadian & Restlessness Support

Hops are most commonly known from brewing, but the flower has a long history in sleep herbalism, particularly when combined with valerian. It may help regulate circadian rhythm and reduce feelings of restlessness in the evening.

Research: Experimental work suggests hops can influence circadian activity and subjective restlessness in humans.
Study: Hops and circadian rhythm/restlessness

11. Choline (130 mg) — REM & Cognitive Restoration

Choline is a precursor to acetylcholine, a neurotransmitter that plays a central role in REM sleep, memory consolidation and dream intensity. It is rarely included in sleep formulas, despite its importance for sleep architecture.

Research: Imbalances in acetylcholine activity have been linked with fragmented sleep and alterations in REM patterns.
Study: Acetylcholine, REM sleep and arousal

12. Vitamin B6 (2.8 mg)

Vitamin B6 is involved in the synthesis of serotonin, dopamine and GABA — all crucial neurotransmitters for healthy sleep, mood and stress response. Deep Sleep™ provides 200% of the NRV per daily serving.

13. Zinc (10 mg)

Zinc is essential for immune function, nervous system health and hormonal balance. It also appears to work synergistically with magnesium and melatonin in supporting sleep onset and quality.

Research: A controlled trial combining zinc, magnesium and melatonin reported improved sleep quality and easier sleep onset in older adults.
Study: Zinc–magnesium–melatonin combination and sleep

Why Deep Sleep™ Works Differently to Typical Sleep Aids

Many over-the-counter “sleeping pills” — including antihistamine-based products — primarily sedate you. They may help you fall asleep, but can leave you groggy, disrupt normal sleep architecture, and are not designed for long-term nightly use.

Deep Sleep™ was formulated instead to target the full biology of sleep using natural, well-tolerated ingredients:

• Serotonin → Melatonin pathway: 5-HTP, L-Tryptophan, Vitamin B6, Montmorency Cherry
• GABA activation & nervous system calm: Magnesium, Passion Flower, Valerian, Chamomile, Lemon Balm, Hops
• Cortisol & stress modulation: Ashwagandha, Lemon Balm
• Sleep architecture & REM support: Choline, Zinc, Magnesium
• Anti-inflammatory & antioxidant support: Tart Cherry polyphenols and plant compounds

Instead of relying on a single mechanism, Deep Sleep™ layers multiple evidence-based pathways to support:

• Natural sleep onset
• Higher deep sleep & REM quality
• Fewer mid-night wake-ups
• More refreshed mornings without drug-like grogginess

What Users Commonly Report (7–14 Days+)

While individual experiences vary, across thousands of customers, common feedback includes:

• “Falling asleep faster than I have in years.”
• “Waking up less — sometimes not at all.”
• “Deepest sleep scores I’ve ever had on my wearable.”
• “Waking up restored, not foggy.”

This aligns with what you would expect when clinically researched ingredients are combined at meaningful doses and used consistently.

Who Deep Sleep™ Is Designed For

• People who wake up multiple times during the night
• Those who struggle to “switch off” in the evening
• Light or restless sleepers
• Individuals with stress-related sleep issues
• Men & women 25+ looking for a natural alternative to drug-based sleep aids
• Anyone focused on long-term sleep quality, recovery and next-day performance

Conclusion: A Comprehensive, Science-Led Natural Sleep Formula

Deep Sleep™ is not just another herbal capsule — it is a scientifically engineered deep-restoration system built around 13 active ingredients. Each component has been selected based on available research and then dosed in line with effective ranges used in human studies.

If you are looking for a natural sleep supplement that aims to support the root biology of sleep — not simply sedate you — Deep Sleep™ stands out as one of the most complete options currently available in the UK.

This article is for information and education only and does not constitute medical advice. Always speak with your GP or healthcare professional before starting any new supplement, especially if you are pregnant, breastfeeding, on medication or have a medical condition.