Magnesium glycinate is the sleep supplement to start with — highly absorbable, calming, and hard to get wrong. Our top-rated UK options are Doctor's Best magnesium glycinate and FutureYou Serene+ (saffron, lavender, magnesium). Tart cherry concentrate adds natural melatonin, and L-theanine calms without sedation.
| # | Product | Rating | Price | Best for | Buy |
|---|---|---|---|---|---|
| 1 | Doctor's Best High Absorption Magnesium Glycinate | 4.7 / 5 | £18-£24 | Highly absorbable form of magnesium that calms the nervous system and supports deep | Check price on Amazon |
| 2 | FutureYou Serene+ Saffron, Lavender and Magnesium | 4.7 / 5 | £25.99 | A practitioner-grade evening blend combining affron saffron | Check price on Amazon |
| 3 | CherryActive Montmorency Tart Cherry Concentrate 946ml | 4.6 / 5 | £24.99 | 100% pure Montmorency tart cherry concentrate | Check price on Amazon |
| 4 | Organic Ashwagandha KSM-66 600mg | 4.6 / 5 | £18-£28 | Adaptogenic herb clinically shown to lower cortisol and improve sleep quality | Check price on Amazon |
| 5 | NOW Foods L-Theanine 200mg (60 Vegan Caps) | 4.6 / 5 | £18-£26 | Amino acid from green tea that promotes relaxation without sedation | Check price on Amazon |
Highly absorbable form of magnesium that calms the nervous system and supports deep, restorative sleep. One of the most consistently recommended supplements by functional medicine practitioners.
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A practitioner-grade evening blend combining affron saffron, lavender and magnesium — three ingredients with human trial data behind them for relaxation and sleep quality. From Cambridge-based FutureYou.
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100% pure Montmorency tart cherry concentrate — natural source of melatonin. One bottle = 3,000 cherries. Add to water 1 hour before bed.
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Adaptogenic herb clinically shown to lower cortisol and improve sleep quality. KSM-66 is the most-studied standardised extract.
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Amino acid from green tea that promotes relaxation without sedation. Pairs beautifully with magnesium for racing-mind insomnia.
Check price on AmazonWe rank the products in our own 63-item UK catalogue by verified Amazon customer rating and by how well each one addresses a specific cause of poor sleep — light, noise, temperature, or an over-active nervous system. We only link to UK listings we have checked ourselves.
Glycinate: it is well absorbed and gentle on the stomach, unlike oxide, which mostly acts as a laxative.
Not over the counter; tart cherry concentrate is the usual food-based route, and prescription melatonin comes from your GP.
Magnesium and L-theanine can help within days, ashwagandha and saffron blends usually need 2–4 weeks of consistent use.
This is general information, not medical advice — speak to your GP about persistent insomnia, and check interactions before starting a supplement. As an Amazon Associate we earn from qualifying purchases. This costs you nothing extra. — Insomnia Hub
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